Public bug reported:

My screen randomly stops blanking, ignoring the interval I set under
Settings > Power > Power Saving Options > Screen blank (8 minutes). This
behaviour behaviour has so far manifested only after I resumed the
system from suspend but that connection is not consistent - more often
than not, the system resumes without any noticeable impact on screen
blanking.

However, when screen blanking does break, it appears to go hand in hand
with an unstable gnome session. That is, when I try to restart my gnome
session (I am using X), it results in a desktop crash and I am forced to
log out.

(on a side note: I noticed the other day that gnome also broke when I
logged out of my second desktop account to return to my main account;
the screen went black and I had to reboot).

The crash does not appear to generate a log but journald has recorded
the following at/around the time that restarting gnome-shell ended in a
crash (the messages are reproduced here in reverse order):

nov 04 02:41:46 Dapple gsd-media-keys[3125]: g_dbus_proxy_call_internal: 
assertion 'G_IS_DBUS_PROXY (proxy)' failed
nov 04 02:41:45 Dapple systemd[2589]: 
org.gnome.Shell-disable-extensions.service - Disable GNOME Shell extensions 
after failure was skipped because of an unmet condition check 
(ConditionPathExists=/run/user/1002/gnome-shell-disa>
nov 04 02:41:45 Dapple systemd[2589]: Reached target 
gnome-session-failed.target - GNOME Session Failed.
nov 04 02:41:45 Dapple systemd[2589]: Started gnome-session-failed.service - 
GNOME Session Failed lockdown screen (user).
nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Triggering 
OnFailure= dependencies.
nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed with 
result 'protocol'.
nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Start 
request repeated too quickly.
nov 04 02:41:45 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 4.
nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed with 
result 'protocol'.
nov 04 02:41:45 Dapple gnome-shell[73870]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
nov 04 02:41:45 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
nov 04 02:41:44 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
nov 04 02:41:44 Dapple xdg-desktop-por[3867]: Failed to get application states: 
GDBus.Error:org.freedesktop.portal.Error.Failed: Could not get window list
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'scale-monitor-framebuffer'
nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'x11-randr-fractional-scaling'
nov 04 02:41:44 Dapple gnome-shell[73870]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
nov 04 02:41:44 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
nov 04 02:41:44 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 3.
nov 04 02:41:44 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed with 
result 'protocol'.
nov 04 02:41:44 Dapple gnome-shell[73803]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
nov 04 02:41:43 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'scale-monitor-framebuffer'
nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'x11-randr-fractional-scaling'
nov 04 02:41:42 Dapple gnome-shell[73803]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
nov 04 02:41:42 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
nov 04 02:41:42 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 2.
nov 04 02:41:42 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed with 
result 'protocol'.
nov 04 02:41:42 Dapple gnome-shell[73740]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
nov 04 02:41:41 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'scale-monitor-framebuffer'
nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'x11-randr-fractional-scaling'
nov 04 02:41:41 Dapple gnome-shell[73740]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
nov 04 02:41:41 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
nov 04 02:41:41 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 1.
nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
nov 04 02:41:41 Dapple gnome-shell[2973]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
nov 04 02:41:40 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
nov 04 02:41:39 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'scale-monitor-framebuffer'
nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'x11-randr-fractional-scaling'
nov 04 02:41:39 Dapple gnome-shell[2973]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: gnome-shell 45.0-1ubuntu2
ProcVersionSignature: Ubuntu 6.5.0-10.10-generic 6.5.3
Uname: Linux 6.5.0-10-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.27.0-0ubuntu5
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Nov  4 02:45:05 2023
DisplayManager: gdm3
InstallationDate: Installed on 2022-10-29 (371 days ago)
InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221020)
RelatedPackageVersions: mutter-common 45.0-3ubuntu3
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to mantic on 2023-10-13 (21 days ago)

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug mantic

** Description changed:

  My screen randomly stops blanking after the interval set under Settings
  > Power > Power Saving Options > Screen blank (8 minutes). This
  behaviour behaviour has so far manifested only after I resumed the
  system from suspend but that connection is not consistent - more often
  than not, the system resumes without any noticeable impact on screen
  blanking.
  
  However, when screen blanking does break, it appears to go hand in hand
  with an unstable gnome session. That is, when I try to restart my gnome
  session (I am using X), it results in a desktop crash and I am forced to
  log out.
+ 
+ (on a side note: I noticed the other day that the system also froze when
+ I logged out of my second desktop account to return to my main account;
+ the screen went black and I had to reboot).
  
  The crash does not appear to generate a log but journald has recorded
  the following at/around the time of the crash (reproduced here in
  reverse order):
  
  nov 04 02:41:46 Dapple gsd-media-keys[3125]: g_dbus_proxy_call_internal: 
assertion 'G_IS_DBUS_PROXY (proxy)' failed
  nov 04 02:41:45 Dapple systemd[2589]: 
org.gnome.Shell-disable-extensions.service - Disable GNOME Shell extensions 
after failure was skipped because of an unmet condition check 
(ConditionPathExists=/run/user/1002/gnome-shell-disa>
  nov 04 02:41:45 Dapple systemd[2589]: Reached target 
gnome-session-failed.target - GNOME Session Failed.
  nov 04 02:41:45 Dapple systemd[2589]: Started gnome-session-failed.service - 
GNOME Session Failed lockdown screen (user).
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Triggering 
OnFailure= dependencies.
  nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Start 
request repeated too quickly.
  nov 04 02:41:45 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 4.
  nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:45 Dapple gnome-shell[73870]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:45 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:44 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:44 Dapple xdg-desktop-por[3867]: Failed to get application 
states: GDBus.Error:org.freedesktop.portal.Error.Failed: Could not get window 
list
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:44 Dapple gnome-shell[73870]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:44 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:44 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 3.
  nov 04 02:41:44 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:44 Dapple gnome-shell[73803]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:43 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:42 Dapple gnome-shell[73803]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:42 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:42 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 2.
  nov 04 02:41:42 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:42 Dapple gnome-shell[73740]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:41 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:41 Dapple gnome-shell[73740]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:41 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
  nov 04 02:41:41 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 1.
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
  nov 04 02:41:41 Dapple gnome-shell[2973]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:40 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:39 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:39 Dapple gnome-shell[2973]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
  nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
  
  ProblemType: Bug
  DistroRelease: Ubuntu 23.10
  Package: gnome-shell 45.0-1ubuntu2
  ProcVersionSignature: Ubuntu 6.5.0-10.10-generic 6.5.3
  Uname: Linux 6.5.0-10-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.27.0-0ubuntu5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Nov  4 02:45:05 2023
  DisplayManager: gdm3
  InstallationDate: Installed on 2022-10-29 (371 days ago)
  InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221020)
  RelatedPackageVersions: mutter-common 45.0-3ubuntu3
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to mantic on 2023-10-13 (21 days ago)

** Description changed:

  My screen randomly stops blanking after the interval set under Settings
  > Power > Power Saving Options > Screen blank (8 minutes). This
  behaviour behaviour has so far manifested only after I resumed the
  system from suspend but that connection is not consistent - more often
  than not, the system resumes without any noticeable impact on screen
  blanking.
  
  However, when screen blanking does break, it appears to go hand in hand
  with an unstable gnome session. That is, when I try to restart my gnome
  session (I am using X), it results in a desktop crash and I am forced to
  log out.
  
  (on a side note: I noticed the other day that the system also froze when
  I logged out of my second desktop account to return to my main account;
  the screen went black and I had to reboot).
  
  The crash does not appear to generate a log but journald has recorded
- the following at/around the time of the crash (reproduced here in
- reverse order):
+ the following at/around the time that restarting gnome-shell ended in a
+ crash (reproduced here in reverse order):
  
  nov 04 02:41:46 Dapple gsd-media-keys[3125]: g_dbus_proxy_call_internal: 
assertion 'G_IS_DBUS_PROXY (proxy)' failed
  nov 04 02:41:45 Dapple systemd[2589]: 
org.gnome.Shell-disable-extensions.service - Disable GNOME Shell extensions 
after failure was skipped because of an unmet condition check 
(ConditionPathExists=/run/user/1002/gnome-shell-disa>
  nov 04 02:41:45 Dapple systemd[2589]: Reached target 
gnome-session-failed.target - GNOME Session Failed.
  nov 04 02:41:45 Dapple systemd[2589]: Started gnome-session-failed.service - 
GNOME Session Failed lockdown screen (user).
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Triggering 
OnFailure= dependencies.
  nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Start 
request repeated too quickly.
  nov 04 02:41:45 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 4.
  nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:45 Dapple gnome-shell[73870]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:45 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:44 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:44 Dapple xdg-desktop-por[3867]: Failed to get application 
states: GDBus.Error:org.freedesktop.portal.Error.Failed: Could not get window 
list
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:44 Dapple gnome-shell[73870]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:44 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:44 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 3.
  nov 04 02:41:44 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:44 Dapple gnome-shell[73803]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:43 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:42 Dapple gnome-shell[73803]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:42 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:42 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 2.
  nov 04 02:41:42 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:42 Dapple gnome-shell[73740]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:41 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:41 Dapple gnome-shell[73740]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:41 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
  nov 04 02:41:41 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 1.
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
  nov 04 02:41:41 Dapple gnome-shell[2973]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:40 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:39 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:39 Dapple gnome-shell[2973]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
  nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
  
  ProblemType: Bug
  DistroRelease: Ubuntu 23.10
  Package: gnome-shell 45.0-1ubuntu2
  ProcVersionSignature: Ubuntu 6.5.0-10.10-generic 6.5.3
  Uname: Linux 6.5.0-10-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.27.0-0ubuntu5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Nov  4 02:45:05 2023
  DisplayManager: gdm3
  InstallationDate: Installed on 2022-10-29 (371 days ago)
  InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221020)
  RelatedPackageVersions: mutter-common 45.0-3ubuntu3
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to mantic on 2023-10-13 (21 days ago)

** Description changed:

- My screen randomly stops blanking after the interval set under Settings
- > Power > Power Saving Options > Screen blank (8 minutes). This
+ My screen randomly stops blanking, ignoring the interval I set under
+ Settings > Power > Power Saving Options > Screen blank (8 minutes). This
  behaviour behaviour has so far manifested only after I resumed the
  system from suspend but that connection is not consistent - more often
  than not, the system resumes without any noticeable impact on screen
  blanking.
  
  However, when screen blanking does break, it appears to go hand in hand
  with an unstable gnome session. That is, when I try to restart my gnome
  session (I am using X), it results in a desktop crash and I am forced to
  log out.
  
  (on a side note: I noticed the other day that the system also froze when
  I logged out of my second desktop account to return to my main account;
  the screen went black and I had to reboot).
  
  The crash does not appear to generate a log but journald has recorded
  the following at/around the time that restarting gnome-shell ended in a
  crash (reproduced here in reverse order):
  
  nov 04 02:41:46 Dapple gsd-media-keys[3125]: g_dbus_proxy_call_internal: 
assertion 'G_IS_DBUS_PROXY (proxy)' failed
  nov 04 02:41:45 Dapple systemd[2589]: 
org.gnome.Shell-disable-extensions.service - Disable GNOME Shell extensions 
after failure was skipped because of an unmet condition check 
(ConditionPathExists=/run/user/1002/gnome-shell-disa>
  nov 04 02:41:45 Dapple systemd[2589]: Reached target 
gnome-session-failed.target - GNOME Session Failed.
  nov 04 02:41:45 Dapple systemd[2589]: Started gnome-session-failed.service - 
GNOME Session Failed lockdown screen (user).
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Triggering 
OnFailure= dependencies.
  nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Start 
request repeated too quickly.
  nov 04 02:41:45 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 4.
  nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:45 Dapple gnome-shell[73870]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:45 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:44 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:44 Dapple xdg-desktop-por[3867]: Failed to get application 
states: GDBus.Error:org.freedesktop.portal.Error.Failed: Could not get window 
list
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:44 Dapple gnome-shell[73870]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:44 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:44 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 3.
  nov 04 02:41:44 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:44 Dapple gnome-shell[73803]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:43 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:42 Dapple gnome-shell[73803]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:42 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:42 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 2.
  nov 04 02:41:42 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:42 Dapple gnome-shell[73740]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:41 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:41 Dapple gnome-shell[73740]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:41 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
  nov 04 02:41:41 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 1.
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
  nov 04 02:41:41 Dapple gnome-shell[2973]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:40 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:39 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:39 Dapple gnome-shell[2973]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
  nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
  
  ProblemType: Bug
  DistroRelease: Ubuntu 23.10
  Package: gnome-shell 45.0-1ubuntu2
  ProcVersionSignature: Ubuntu 6.5.0-10.10-generic 6.5.3
  Uname: Linux 6.5.0-10-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.27.0-0ubuntu5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Nov  4 02:45:05 2023
  DisplayManager: gdm3
  InstallationDate: Installed on 2022-10-29 (371 days ago)
  InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221020)
  RelatedPackageVersions: mutter-common 45.0-3ubuntu3
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to mantic on 2023-10-13 (21 days ago)

** Description changed:

  My screen randomly stops blanking, ignoring the interval I set under
  Settings > Power > Power Saving Options > Screen blank (8 minutes). This
  behaviour behaviour has so far manifested only after I resumed the
  system from suspend but that connection is not consistent - more often
  than not, the system resumes without any noticeable impact on screen
  blanking.
  
  However, when screen blanking does break, it appears to go hand in hand
  with an unstable gnome session. That is, when I try to restart my gnome
  session (I am using X), it results in a desktop crash and I am forced to
  log out.
  
- (on a side note: I noticed the other day that the system also froze when
- I logged out of my second desktop account to return to my main account;
+ (on a side note: I noticed the other day that gnome also broke when I
+ logged out of my second desktop account to return to my main account;
  the screen went black and I had to reboot).
  
  The crash does not appear to generate a log but journald has recorded
  the following at/around the time that restarting gnome-shell ended in a
  crash (reproduced here in reverse order):
  
  nov 04 02:41:46 Dapple gsd-media-keys[3125]: g_dbus_proxy_call_internal: 
assertion 'G_IS_DBUS_PROXY (proxy)' failed
  nov 04 02:41:45 Dapple systemd[2589]: 
org.gnome.Shell-disable-extensions.service - Disable GNOME Shell extensions 
after failure was skipped because of an unmet condition check 
(ConditionPathExists=/run/user/1002/gnome-shell-disa>
  nov 04 02:41:45 Dapple systemd[2589]: Reached target 
gnome-session-failed.target - GNOME Session Failed.
  nov 04 02:41:45 Dapple systemd[2589]: Started gnome-session-failed.service - 
GNOME Session Failed lockdown screen (user).
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Triggering 
OnFailure= dependencies.
  nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Start 
request repeated too quickly.
  nov 04 02:41:45 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 4.
  nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:45 Dapple gnome-shell[73870]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:45 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:44 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:44 Dapple xdg-desktop-por[3867]: Failed to get application 
states: GDBus.Error:org.freedesktop.portal.Error.Failed: Could not get window 
list
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:44 Dapple gnome-shell[73870]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:44 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:44 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 3.
  nov 04 02:41:44 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:44 Dapple gnome-shell[73803]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:43 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:42 Dapple gnome-shell[73803]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:42 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:42 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 2.
  nov 04 02:41:42 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:42 Dapple gnome-shell[73740]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:41 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:41 Dapple gnome-shell[73740]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:41 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
  nov 04 02:41:41 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 1.
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
  nov 04 02:41:41 Dapple gnome-shell[2973]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:40 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:39 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:39 Dapple gnome-shell[2973]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
  nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
  
  ProblemType: Bug
  DistroRelease: Ubuntu 23.10
  Package: gnome-shell 45.0-1ubuntu2
  ProcVersionSignature: Ubuntu 6.5.0-10.10-generic 6.5.3
  Uname: Linux 6.5.0-10-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.27.0-0ubuntu5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Nov  4 02:45:05 2023
  DisplayManager: gdm3
  InstallationDate: Installed on 2022-10-29 (371 days ago)
  InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221020)
  RelatedPackageVersions: mutter-common 45.0-3ubuntu3
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to mantic on 2023-10-13 (21 days ago)

** Description changed:

  My screen randomly stops blanking, ignoring the interval I set under
  Settings > Power > Power Saving Options > Screen blank (8 minutes). This
  behaviour behaviour has so far manifested only after I resumed the
  system from suspend but that connection is not consistent - more often
  than not, the system resumes without any noticeable impact on screen
  blanking.
  
  However, when screen blanking does break, it appears to go hand in hand
  with an unstable gnome session. That is, when I try to restart my gnome
  session (I am using X), it results in a desktop crash and I am forced to
  log out.
  
  (on a side note: I noticed the other day that gnome also broke when I
  logged out of my second desktop account to return to my main account;
  the screen went black and I had to reboot).
  
  The crash does not appear to generate a log but journald has recorded
  the following at/around the time that restarting gnome-shell ended in a
- crash (reproduced here in reverse order):
+ crash (the messages are reproduced here in reverse order):
  
  nov 04 02:41:46 Dapple gsd-media-keys[3125]: g_dbus_proxy_call_internal: 
assertion 'G_IS_DBUS_PROXY (proxy)' failed
  nov 04 02:41:45 Dapple systemd[2589]: 
org.gnome.Shell-disable-extensions.service - Disable GNOME Shell extensions 
after failure was skipped because of an unmet condition check 
(ConditionPathExists=/run/user/1002/gnome-shell-disa>
  nov 04 02:41:45 Dapple systemd[2589]: Reached target 
gnome-session-failed.target - GNOME Session Failed.
  nov 04 02:41:45 Dapple systemd[2589]: Started gnome-session-failed.service - 
GNOME Session Failed lockdown screen (user).
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Triggering 
OnFailure= dependencies.
  nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Start 
request repeated too quickly.
  nov 04 02:41:45 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 4.
  nov 04 02:41:45 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:45 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:45 Dapple gnome-shell[73870]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:45 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:44 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:44 Dapple xdg-desktop-por[3867]: Failed to get application 
states: GDBus.Error:org.freedesktop.portal.Error.Failed: Could not get window 
list
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:44 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:44 Dapple gnome-shell[73870]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:44 Dapple gnome-shell[73870]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:44 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:44 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 3.
  nov 04 02:41:44 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:44 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:44 Dapple gnome-shell[73803]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:43 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:42 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:42 Dapple gnome-shell[73803]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:42 Dapple gnome-shell[73803]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:42 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:42 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 2.
  nov 04 02:41:42 Dapple systemd[2589]: Failed to start 
org.gnome.Shell@x11.service - GNOME Shell on X11.
  nov 04 02:41:42 Dapple systemd[2589]: org.gnome.Shell@x11.service: Failed 
with result 'protocol'.
  nov 04 02:41:42 Dapple gnome-shell[73740]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:42 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:41 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:41 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:41 Dapple gnome-shell[73740]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:41 Dapple gnome-shell[73740]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:41 Dapple systemd[2589]: Starting org.gnome.Shell@x11.service - 
GNOME Shell on X11...
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
  nov 04 02:41:41 Dapple systemd[2589]: Stopped org.gnome.Shell@x11.service - 
GNOME Shell on X11.
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Scheduled 
restart job, restart counter is at 1.
  nov 04 02:41:41 Dapple systemd[2589]: org.gnome.Shell@x11.service: Consumed 
11min 57.398s CPU time.
  nov 04 02:41:41 Dapple gnome-shell[2973]: Window manager error: Another 
compositing manager is already running on screen 0 on display “:1”.
  nov 04 02:41:40 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:39 Dapple gsd-media-keys[3125]: Failed to grab accelerators: 
GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: Object does not exist at 
path “/org/gnome/Shell”
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: 330.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-4: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: 165.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-3: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: 960.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: Internal DisplayPort
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
DFP-2: disconnected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): 600.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
BenQ EW3270U (DFP-1): connected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): 330.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): Internal TMDS
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
Samsung SyncMaster (DFP-0): connected
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0):
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: 400.0 MHz maximum pixel clock
  nov 04 02:41:39 Dapple /usr/libexec/gdm-x-session[2762]: (--) NVIDIA(GPU-0): 
CRT-0: disconnected
  nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'scale-monitor-framebuffer'
  nov 04 02:41:39 Dapple gnome-shell[2973]: Enabling experimental feature 
'x11-randr-fractional-scaling'
  nov 04 02:41:39 Dapple gnome-shell[2973]: Running GNOME Shell (using mutter 
45.0) as a X11 window and compositing manager
  nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
  nov 04 02:41:39 Dapple gnome-terminal-[49629]: g_atomic_ref_count_dec: 
assertion 'old_value > 0' failed
  
  ProblemType: Bug
  DistroRelease: Ubuntu 23.10
  Package: gnome-shell 45.0-1ubuntu2
  ProcVersionSignature: Ubuntu 6.5.0-10.10-generic 6.5.3
  Uname: Linux 6.5.0-10-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.27.0-0ubuntu5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Nov  4 02:45:05 2023
  DisplayManager: gdm3
  InstallationDate: Installed on 2022-10-29 (371 days ago)
  InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Release amd64 (20221020)
  RelatedPackageVersions: mutter-common 45.0-3ubuntu3
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to mantic on 2023-10-13 (21 days ago)

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https://bugs.launchpad.net/bugs/2042705

Title:
  screen blank randomly fails and system crashes when X is restarted

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