Got directed here from bug (private due to coredump attachement) that Daniel marked a duplicate of this one.
I can reliably reproduce my original issue following: 1. Fresh boot 2. Connect external monitors 3. Put laptop to sleep 4. Wake laptop from sleep (one of two external monitors is still black) 5. Go to Settings -> Display (Gnome thinks both monitors are enabled) 6. Disable the black monitor and enable it again. 7. Gnome enables the problematic monitor for a split second and then disables it instantly. Attaching prevboot.txt for the above. I have so far two workarounds for my issue Workaround 1: - go to TTY3 with Ctrl+Alt+F3 (no need to log in, just wait for all monitors to work) - go to TTY1 with Ctrl+Alt+F1 (lands on GDM log in page, I log in) - all monitors now work and applications are preserved (sometimes need to enable it in settings) Workaround 2: - power cycle the black monitor (but without messing with Settings -> Display first) Happy to provide more information or test solutions. It was driving me crazy to at least figure out reproducibility pattern and possible workarounds (stayed until 3am one night experimenting...). Not sure if useful but I also learned: - happens also on kernel 5.17 from https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.17.2/amd64/ - happens also on live usb session from Ubuntu 22.04 so not likely my local changes - does not happen on live usb of fedora 36 beta (tested as it also has gnome 42) ** Attachment added: "prevboot.txt" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1964120/+attachment/5580363/+files/prevboot.txt -- 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/1964120 Title: gnome-shell crashed with SIGSEGV at ?+a7c called from (Cannot access memory at address [in stack]) Status in gnome-shell package in Ubuntu: Confirmed Bug description: The Desktop has some issues but it was not showable ProblemType: Crash DistroRelease: Ubuntu 22.04 Package: gnome-shell 42~beta-1ubuntu1 Uname: Linux 5.16.12-051612-generic x86_64 ApportVersion: 2.20.11-0ubuntu78 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Mon Mar 7 12:12:08 2022 DisplayManager: gdm3 ExecutablePath: /usr/bin/gnome-shell InstallationDate: Installed on 2022-03-04 (4 days ago) InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012) ProcCmdline: /usr/bin/gnome-shell ProcEnviron: LANG=de_DE.UTF-8 PATH=(custom, user) SHELL=/bin/bash XDG_RUNTIME_DIR=<set> RelatedPackageVersions: mutter-common 42~beta-1ubuntu1 Signal: 11 SourcePackage: gnome-shell Stacktrace: #0 0x00007f0d7aec5a7c in ?? () No symbol table info available. Backtrace stopped: Cannot access memory at address 0x7ffce8d834a0 StacktraceTop: ?? () Title: gnome-shell crashed with SIGSEGV UpgradeStatus: Upgraded to jammy on 2022-03-04 (4 days ago) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo separator: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1964120/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
