** Description changed: If you are hitting this bug, please write your case in https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3984. [Impact] This causes one of the top Gnome-Shell crashes as caught by Ubuntu error tracker. It happens when /tmp/.X11-unix is accessible by the user but does not pass a stricter permission check Mutter makes. In the typical Ubuntu setup, both /tmp and /tmp/.X11-unix are root:root rwxrwxrwt, so it passes that stricter permission check. [Test case] - 1. Restart Ubuntu in the console or alternatively 'systemctl stop gdm'. - 2. From the proposed pocket, download the binary packages stemming from the mutter source package. - 3. chmod 1007 /tmp/.X11-unix - 4. MUTTER_DEBUG=all G_DEBUG=1 dbus-run-session -- gnome-shell --display-server --wayland &>log + 1. Stop GDM: - Gnome-Shell must start and Mutter (you can check ps output if you are - not acquainted with the looks of those pieces of software). + systemctl stop gdm - Now open xterm and kill the graphical environment with + This will bring you to the virtual console (i.e. without a graphical + environment, only command-line). - 5. pkill wayland + 2. Install mutter, gir1.2-mutter-15, libmutter-15-0, mutter-common, + mutter-common-bin from proposed (the exact steps to enable proposed are + laid down by the SRU bot comment to this bug). + + 3. Execute: + + chmod 1007 /tmp/.X11-unix + + 4. Execute: + + MUTTER_DEBUG=all G_DEBUG=1 dbus-run-session -- gnome-shell --display- + server --wayland &>log + + Gnome-Shell must start and Mutter (you can look for them in 'ps aux' + output if you are not acquainted with the looks of those pieces of + software). + + 5. Now open xterm and kill the graphical environment by executing: + + pkill wayland Verify that there are no mentions of the issue directory in the log, i.e. 'grep X11-unix log' returns nothing. [Where problems could occur] In Mutter or Gnome-Shell, particularly at launch phase. Also make sure Xorg applications behave normally (that's why xterm is included in test case), without failing to open or delays. --------------- The Ubuntu Error Tracker has been receiving reports about a problem regarding gnome-shell. This problem was most recently seen with package version 46.0-0ubuntu5.1, the problem page at https://errors.ubuntu.com/problem/a7dbd55723a8ea326d1ccf32e31fe307151786c2 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/.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2069564 Title: [SRU] gnome-shell crashed with SIGTRAP in meta_wayland_compositor_new() from meta_context_start() from main() ["Failed to start X Wayland: Directory \"/tmp/.X11-unix\" is not writable"] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2069564/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
