I came here from 1969351. On a rig with two identical AMD GPUs (First driving one monitor, second driving three), I'll sometimes have the one monitor disconnect, but it won't detect the failure or cause the other three screens to rearrange until I try to apply a change in Display Settings, after which it will show the one monitor as missing. The system will continue operating normally for a minute or two, before crashing back to the login screen
Dmesg shows these entries: [127759.552431] gnome-shell[4403]: segfault at 558324328300 ip 0000558324328300 sp 00007ffd66257c98 error 15 [127780.586613] apport-gtk[272085]: segfault at 18 ip 00007fa1e6314cf4 sp 00007fff77ca9820 error 4 in libgtk-3.so.0.2404.29[7fa1e620c000+383000] [130882.632498] traps: gnome-shell[272824] general protection fault ip:7f3228a412e7 sp:7ffe4c6be868 error:0 in libgbm.so.1.0.0[7f3228a40000+8000] [176834.926719] gnome-shell[285277]: segfault at 501000000af ip 00007f250fbc92e7 sp 00007fff283ee988 error 4 in libgbm.so.1.0.0[7f250fbc8000+8000] - Sometimes the system crashes to the login screen during a screen lock without any interaction - Sometimes the system crashes to the login screen when attempting to unlock a locked session - Sometimes after unlock a session shows all the windows rearranged or consolidated into a single workspace as though a monitor was briefly disconnected. Often windows are 'maximized' with a strange offset from a monitor's edge, which is fixed by re-maximizing the window. - Sometimes after unlock everything is fine. I have crash reports for the most recent failure in /var/crash, though I'm not sure how to provide them. _usr_bin_gnome-shell.1000.crash is nearly 70MiB -- 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/1969422 Title: gnome-shell crashed with SIGSEGV in gbm_surface_release_buffer() from meta_drm_buffer_gbm_finalize() from g_object_unref() from g_object_unref() from g_set_object() Status in Mutter: Unknown Status in mutter package in Ubuntu: New Bug description: The Ubuntu Error Tracker has been receiving reports about a problem regarding gnome-shell. This problem was most recently seen with package version 42.0-1ubuntu1, the problem page at https://errors.ubuntu.com/problem/4fa0be3b67c650c621a425137efd7376c32451b4 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports. If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/. To manage notifications about this bug go to: https://bugs.launchpad.net/mutter/+bug/1969422/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
