Your GUI is hanging
Sep 21 14:30:43 hostname org.gnome.Shell.desktop[2881]: Window manager
warning: last_user_time (850630) is greater than comparison timestamp
(850629). This most likely represents a buggy client sending inaccurate
timestamps in messages such as _NET_ACTIVE_WINDOW. Trying to work
around...
for apparently the same reasons as the kernel:
Sep 21 15:25:24 hostname kernel: [drm:intel_pipe_update_end [i915]]
*ERROR* Atomic update failure on pipe A (start=56315 end=56316) time 495
us, min 763, max 767, scanline start 762, end 786
which is a hardware/firmware bug (!?):
Sep 21 14:16:41 hostname kernel: [Firmware Bug]: TSC ADJUST: CPU0: -1008111239
force to 0
Sep 21 14:16:41 hostname kernel: [Firmware Bug]: TSC ADJUST differs: Reference
CPU0: -1008111239 CPU1: 0
Sep 21 14:16:41 hostname kernel: #2
Sep 21 14:16:41 hostname kernel: [Firmware Bug]: TSC ADJUST differs: Reference
CPU0: -1008111239 CPU2: 0
Sep 21 14:16:41 hostname kernel: #3
Sep 21 14:16:41 hostname kernel: [Firmware Bug]: TSC ADJUST differs: Reference
CPU0: -1008111239 CPU3: 0
I've never seen this happen before but have encountered plenty of code
over the years where such bugs were expected and had to be handled. It
sounds like you may need a different kernel, different BIOS, or new
firmware from Intel. It's certainly not gnome-shell's fault that it
might hang in such a volatile environment.
** Changed in: gnome-shell (Ubuntu)
Status: New => Invalid
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1718573
Title:
Cannot unlock lock screen
Status in gnome-shell package in Ubuntu:
Invalid
Status in linux package in Ubuntu:
New
Bug description:
To replicate:
Leave the computer unattended until the screen locks, then press some keys
and click the mouse.
Expected results:
A password confirmation dialog should appear.
Actual results:
All mouse clicks and key presses are ignored except ctrl-alt-F1.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-settings-daemon 3.26.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.12.0-13.14-generic 4.12.10
Uname: Linux 4.12.0-13-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Sep 21 15:39:09 2017
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/gnome-settings-daemon/gsd-screensaver-proxy
InstallationDate: Installed on 2017-08-15 (36 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64
(20170215.2)
SourcePackage: gnome-settings-daemon
UpgradeStatus: Upgraded to artful on 2017-09-14 (6 days ago)
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