Public bug reported: Reported initially as comments of bug #1887998:
[ Impact ] Ubuntu session doesn't start with some particular monitor configurations, as per this fatal assertion: Jul 27 00:30:33 jojda gnome-shell[15068]: mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:33 jojda gnome-shell[15068]: Bail out! mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Main process exited, code=dumped, status=6/ABRT Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Failed with result 'core-dump'. [ Test case ] Start ubuntu session, you should be able to log-in and no error fallback dialog is shown. [ Regression potential ] Screen size is not set properly for the session, panning is enabled. --- https://launchpad.net/ubuntu/+source/mutter/3.36.4-0ubuntu0.20.04.1 does not fix it. Unfortunately I cannot switch to Wayland because it doesn't start on my system (video card: 00:02.0 VGA compatible controller: Intel Corporation Iris Plus Graphics 655 (rev 01)). Symptom is that after waking up from sleep I get white screen of death that says what the bug description says ("Oh no! Something has gone wrong. A problem has occurred and the system can't recover. Please log out and try again.") and I have to click the Log out button at which points it lets me log in again. Sometime it does the same thing again right after logging in. Syslog message are also pretty much the same as from other comments, here you can see it failing twice, first up while running then right after re-login. Jul 27 00:30:31 jojda gnome-shell[4633]: gvc_mixer_card_get_index: assertion 'GVC_IS_MIXER_CARD (card)' failed Jul 27 00:30:32 jojda gnome-shell[4633]: ** Jul 27 00:30:32 jojda gnome-shell[4633]: mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:32 jojda gnome-shell[4633]: Bail out! mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:32 jojda systemd[4297]: gnome-shell-x11.service: Main process exited, code=dumped, status=6/ABRT Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Failed with result 'core-dump'. Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Scheduled restart job, restart counter is at 1. Jul 27 00:30:33 jojda systemd[4297]: Stopped target GNOME X11 Session (session: ubuntu). Jul 27 00:30:33 jojda systemd[4297]: Stopping GNOME X11 Session (session: ubuntu). Jul 27 00:30:33 jojda systemd[4297]: Stopped target GNOME X11 Session. Jul 27 00:30:33 jojda systemd[4297]: Stopping GNOME X11 Session. Jul 27 00:30:33 jojda systemd[4297]: Stopped target GNOME Shell on X11. Jul 27 00:30:33 jojda systemd[4297]: Stopping GNOME Shell on X11. Jul 27 00:30:33 jojda systemd[4297]: Stopped GNOME Shell on X11. Jul 27 00:30:33 jojda systemd[4297]: Starting GNOME Shell on X11... Jul 27 00:30:33 jojda gnome-shell[15068]: Enabling experimental feature 'x11-randr-fractional-scaling' Jul 27 00:30:33 jojda gnome-shell[15068]: ** Jul 27 00:30:33 jojda gnome-shell[15068]: mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:33 jojda gnome-shell[15068]: Bail out! mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Main process exited, code=dumped, status=6/ABRT Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Failed with result 'core-dump'. Jul 27 00:30:33 jojda systemd[4297]: Failed to start GNOME Shell on X11. Jul 27 00:30:33 jojda systemd[4297]: Dependency failed for GNOME Shell on X11. Jul 27 00:30:33 jojda systemd[4297]: Dependency failed for GNOME X11 Session. Jul 27 00:30:33 jojda systemd[4297]: Dependency failed for GNOME X11 Session (session: ubuntu). Jul 27 00:30:33 jojda systemd[4297]: gnome-session-x11@ubuntu.target: Job gnome-session-x11@ubuntu.target/start failed with result 'dependency'. Jul 27 00:30:33 jojda systemd[4297]: gnome-session-x11.target: Job gnome-session-x11.target/start failed with result 'dependency'. Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.target: Job gnome-shell-x11.target/start failed with result 'dependency'. Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Scheduled restart job, restart counter is at 2. Jul 27 00:30:33 jojda systemd[4297]: Stopped GNOME Shell on X11. ** Affects: mutter (Ubuntu) Importance: Critical Assignee: Marco Trevisan (Treviño) (3v1n0) Status: In Progress -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1889090 Title: GNOME Shell doesn't start Ubuntu session with 3.36.4 as per assertion in meta_monitor_manager_xrandr_update_screen_size Status in mutter package in Ubuntu: In Progress Bug description: Reported initially as comments of bug #1887998: [ Impact ] Ubuntu session doesn't start with some particular monitor configurations, as per this fatal assertion: Jul 27 00:30:33 jojda gnome-shell[15068]: mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:33 jojda gnome-shell[15068]: Bail out! mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Main process exited, code=dumped, status=6/ABRT Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Failed with result 'core-dump'. [ Test case ] Start ubuntu session, you should be able to log-in and no error fallback dialog is shown. [ Regression potential ] Screen size is not set properly for the session, panning is enabled. --- https://launchpad.net/ubuntu/+source/mutter/3.36.4-0ubuntu0.20.04.1 does not fix it. Unfortunately I cannot switch to Wayland because it doesn't start on my system (video card: 00:02.0 VGA compatible controller: Intel Corporation Iris Plus Graphics 655 (rev 01)). Symptom is that after waking up from sleep I get white screen of death that says what the bug description says ("Oh no! Something has gone wrong. A problem has occurred and the system can't recover. Please log out and try again.") and I have to click the Log out button at which points it lets me log in again. Sometime it does the same thing again right after logging in. Syslog message are also pretty much the same as from other comments, here you can see it failing twice, first up while running then right after re-login. Jul 27 00:30:31 jojda gnome-shell[4633]: gvc_mixer_card_get_index: assertion 'GVC_IS_MIXER_CARD (card)' failed Jul 27 00:30:32 jojda gnome-shell[4633]: ** Jul 27 00:30:32 jojda gnome-shell[4633]: mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:32 jojda gnome-shell[4633]: Bail out! mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:32 jojda systemd[4297]: gnome-shell-x11.service: Main process exited, code=dumped, status=6/ABRT Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Failed with result 'core-dump'. Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Scheduled restart job, restart counter is at 1. Jul 27 00:30:33 jojda systemd[4297]: Stopped target GNOME X11 Session (session: ubuntu). Jul 27 00:30:33 jojda systemd[4297]: Stopping GNOME X11 Session (session: ubuntu). Jul 27 00:30:33 jojda systemd[4297]: Stopped target GNOME X11 Session. Jul 27 00:30:33 jojda systemd[4297]: Stopping GNOME X11 Session. Jul 27 00:30:33 jojda systemd[4297]: Stopped target GNOME Shell on X11. Jul 27 00:30:33 jojda systemd[4297]: Stopping GNOME Shell on X11. Jul 27 00:30:33 jojda systemd[4297]: Stopped GNOME Shell on X11. Jul 27 00:30:33 jojda systemd[4297]: Starting GNOME Shell on X11... Jul 27 00:30:33 jojda gnome-shell[15068]: Enabling experimental feature 'x11-randr-fractional-scaling' Jul 27 00:30:33 jojda gnome-shell[15068]: ** Jul 27 00:30:33 jojda gnome-shell[15068]: mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:33 jojda gnome-shell[15068]: Bail out! mutter:ERROR:../src/backends/x11/meta-monitor-manager-xrandr.c:211:meta_monitor_manager_xrandr_update_screen_size: assertion failed: (width > 0 && height > 0 && scale > 0) Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Main process exited, code=dumped, status=6/ABRT Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Failed with result 'core-dump'. Jul 27 00:30:33 jojda systemd[4297]: Failed to start GNOME Shell on X11. Jul 27 00:30:33 jojda systemd[4297]: Dependency failed for GNOME Shell on X11. Jul 27 00:30:33 jojda systemd[4297]: Dependency failed for GNOME X11 Session. Jul 27 00:30:33 jojda systemd[4297]: Dependency failed for GNOME X11 Session (session: ubuntu). Jul 27 00:30:33 jojda systemd[4297]: gnome-session-x11@ubuntu.target: Job gnome-session-x11@ubuntu.target/start failed with result 'dependency'. Jul 27 00:30:33 jojda systemd[4297]: gnome-session-x11.target: Job gnome-session-x11.target/start failed with result 'dependency'. Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.target: Job gnome-shell-x11.target/start failed with result 'dependency'. Jul 27 00:30:33 jojda systemd[4297]: gnome-shell-x11.service: Scheduled restart job, restart counter is at 2. Jul 27 00:30:33 jojda systemd[4297]: Stopped GNOME Shell on X11. 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