apport-retrace -g _usr_bin_gnome-shell.1000.crash

bt

indicates it's an assert in standard_pict_format_for_depth:

(gdb) bt
#0  0x00007f75c68f0727 in raise (sig=<optimized out>) at 
../sysdeps/unix/sysv/linux/raise.c:51
#1  0x000056149221ba6b in dump_gjs_stack_on_signal_handler (signo=6) at 
../src/main.c:367
#2  0x00007f75c68f0890 in <signal handler called> () at 
/lib/x86_64-linux-gnu/libpthread.so.0
#3  0x00007f75c652be97 in __GI_raise (sig=sig@entry=6) at 
../sysdeps/unix/sysv/linux/raise.c:51
#4  0x00007f75c652d801 in __GI_abort () at abort.c:79
#5  0x00007f75c868dfa5 in g_assertion_message () at 
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f75c868e00a in g_assertion_message_expr () at 
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f75c6bb5fbe in standard_pict_format_for_depth (depth=<optimized 
out>) at x11/iconcache.c:303
#8  0x00007f75c6bb5fbe in pict_format_for_depth (depth=<optimized out>, 
xdisplay=0x56149472f000) at x11/iconcache.c:310
#9  0x00007f75c6bb5fbe in surface_from_pixmap 
(xdisplay=xdisplay@entry=0x56149472f000, xpixmap=xpixmap@entry=31457330, 
height=<optimized out>, width=<optimized out>)
    at x11/iconcache.c:325
#10 0x00007f75c6bb6117 in try_pixmap_and_mask (display=0x5614949c0200, 
src_pixmap=src_pixmap@entry=31457330, src_mask=src_mask@entry=31457332, 
iconp=iconp@entry=0x7fff9d183198) at x11/iconcache.c:345
#11 0x00007f75c6bb65a4 in meta_read_icons (screen=0x56149454bcd0, 
xwindow=31457316, icon_cache=0x561495d18df8, wm_hints_pixmap=31457330, 
wm_hints_mask=31457332, iconp=iconp@entry=0x7fff9d183198, ideal_width=96, 
ideal_height=96, mini_iconp=0x7fff9d1831a0, ideal_mini_width=16, 
ideal_mini_height=16) at x11/iconcache.c:546
#12 0x00007f75c6bbd3c1 in meta_window_x11_update_icon (window=0x561495d18e30, 
icon=0x7fff9d183198, mini_icon=0x7fff9d1831a0) at x11/window-x11.c:1472
#13 0x00007f75c6ba2608 in meta_window_update_icon_now 
(window=window@entry=0x561495d18e30, force=force@entry=1) at core/window.c:5326
#14 0x00007f75c6ba9abd in _meta_window_shared_new 
(display=display@entry=0x5614949c0200, screen=screen@entry=0x56149454bcd0, 
client_type=client_type@entry=META_WINDOW_CLIENT_TYPE_X11, 
surface=surface@entry=0x0, xwindow=xwindow@entry=31457316, 
existing_wm_state=existing_wm_state@entry=0, effect=<optimized out>, 
attrs=<optimized out>)
    at core/window.c:1148
#15 0x00007f75c6bbf6a0 in meta_window_x11_new 
(display=display@entry=0x5614949c0200, xwindow=31457316, 
must_be_viewable=must_be_viewable@entry=0, 
effect=effect@entry=META_COMP_EFFECT_CREATE) at x11/window-x11.c:3148
#16 0x00007f75c6bb4554 in handle_other_xevent 
(display=display@entry=0x5614949c0200, event=event@entry=0x7fff9d183640) at 
x11/events.c:1372
#17 0x00007f75c6bb4deb in meta_display_handle_xevent (event=0x7fff9d183640, 
display=0x5614949c0200) at x11/events.c:1791
#18 0x00007f75c6bb4deb in xevent_filter (xevent=0x7fff9d183640, 
event=<optimized out>, data=0x5614949c0200) at x11/events.c:1830
#19 0x00007f75c5e07edf in  () at /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
#20 0x00007f75c5e081c9 in  () at /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
#21 0x00007f75c5dd2d70 in gdk_display_get_event () at 
/usr/lib/x86_64-linux-gnu/libgdk-3.so.0
#22 0x00007f75c5e07f72 in  () at /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
#23 0x00007f75c8667287 in g_main_context_dispatch () at 
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f75c86674c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f75c86677d2 in g_main_loop_run () at 
/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f75c6b94a7c in meta_run () at core/main.c:664

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1766938

Title:
  gnome-shell crashes after a few seconds

Status in gnome-shell package in Ubuntu:
  New

Bug description:
  I have a fleet of Dell T7500's, a few Dell 3620's, a Skull Canyon, and
  a Hades Canyon, and a few other odds and ends, running a mix of ubuntu
  16.04 and 17.10.

  On one of the T7500 ubuntu 17.10 boxes (nvidia 340 package, Quadro K5000 
card),
  I did sudo "do-release-upgrade -d".  Went fine, but on reboot, the desktop 
would
  come up for about ten seconds, then the system would shut down.

  Did 
    systemctl set-default multi-user.target
  then removed all traces of the proprietary driver with
    sudo apt remove --purge nvidia-340 nvidia-opencl-icd-340 nvidia-settings 
nvidia-384 nvidia-opencl-icd-384 nvidia-prime  libcuda1-340
  and rebooted.  Logging in to the console and running 'startx' reproduces the 
problem reliably, and does not shut down the system.

  Installing lwm, and a .xinitrc that started an xterm, let startx succeed, and
  the system was stable running firefox, so it's not an obvious graphics 
problem.

  /var/log/syslog says

  Apr 25 09:59:41 rbb-ubu1710-3 org.gnome.Shell.desktop[3936]: **
  Apr 25 09:59:41 rbb-ubu1710-3 org.gnome.Shell.desktop[3936]: 
mutter:ERROR:x11/iconcache.c:303:standard_pict_format_for_depth: code should 
not be reached
  Apr 25 09:59:41 rbb-ubu1710-3 org.gnome.Shell.desktop[3936]: == Stack trace 
for context 0x556d30f3c4c0 ==
  Apr 25 09:59:41 rbb-ubu1710-3 dbus-daemon[690]: [system] Successfully 
activated service 'org.freedesktop.fwupd'
  Apr 25 09:59:41 rbb-ubu1710-3 systemd[1]: Started Firmware update daemon.
  Apr 25 09:59:42 rbb-ubu1710-3 PackageKit: get-updates transaction 
/2379_acbceaca from uid 1000 finished with success after 1175ms
  Apr 25 09:59:42 rbb-ubu1710-3 gnome-session[3605]: 
gnome-session-binary[3605]: WARNING: Application 'org.gnome.Shell.desktop' 
killed by signal 6
  Apr 25 09:59:42 rbb-ubu1710-3 gnome-session[3605]: 
gnome-session-binary[3605]: WARNING: App 'org.gnome.Shell.desktop' respawning 
too quickly
  Apr 25 09:59:42 rbb-ubu1710-3 gnome-session[3605]: 
gnome-session-binary[3605]: CRITICAL: We failed, but the fail whale is dead. 
Sorry....
  Apr 25 09:59:42 rbb-ubu1710-3 gnome-session-binary[3605]: Unrecoverable 
failure in required component org.gnome.Shell.desktop
  Apr 25 09:59:42 rbb-ubu1710-3 gnome-session-binary[3605]: WARNING: 
Application 'org.gnome.Shell.desktop' killed by signal 6
  Apr 25 09:59:42 rbb-ubu1710-3 gnome-session-binary[3605]: WARNING: App 
'org.gnome.Shell.desktop' respawning too quickly
  Apr 25 09:59:42 rbb-ubu1710-3 gnome-session-binary[3605]: CRITICAL: We 
failed, but the fail whale is dead. Sorry....

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: gnome-shell 3.28.1-0ubuntu2
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  Date: Wed Apr 25 10:06:55 2018
  DisplayManager:
   
  GsettingsChanges: b'org.gnome.desktop.interface' b'gtk-im-module' 
b"'gtk-im-context-simple'"
  InstallationDate: Installed on 2018-01-04 (111 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170918)
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to bionic on 2018-04-24 (0 days ago)

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