*** This bug is a duplicate of bug 2069564 ***
https://bugs.launchpad.net/bugs/2069564
> Failed to start X Wayland: Directory "/tmp/.X11-unix" is not writable
> [email protected]: Main process exited, code=dumped,
> status=5/TRAP
This is bug 2069564.
There remain a few interesting questions:
1) Why does the update to gdm 46.2-1ubuntu1~24.04.3 matter?
- As evidenced by drminfo.txt, your machine does not match the Dell SKUs
which would have changed default from Xorg to Wayland;
- The only other change is that the display initialization may now be a
little bit more delayed, as we properly wait for the kernel to finish hardware
discovery and driver loading. But I cannot find any reason that this would be
connected to the shown error message.
2) Why does auto-login matter?
If you can reproduce again, please check the directory permissions for
/tmp/.X11-unix on a failed log-in (before rebooting; you may for example
switch to another TTY to investigate): `ls -la /tmp/.X11-unix`
I'm going to close this bug as a duplicate. Please add your findings to
bug 2069564.
** This bug has been marked a duplicate of bug 2069564
[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"]
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https://bugs.launchpad.net/bugs/2129777
Title:
Automatic Login with latest gdm3 is broken
Status in gdm3 package in Ubuntu:
New
Bug description:
Hello,
This issue is probably linked to bug #2128840, but in my case,
MUTTER_DEBUG_FORCE_EGL_STREAM env var is not set.
In short, upgrading to gdm3 46.2-1ubuntu1~24.04.3 and rebooting,
caused the desktop could not be reached: black screen only. Removing
the Automatic Login entries from /etc/gdm3/custom.conf and rebooting
fixed the issue. Downgrading to the previous version
(46.2-1ubuntu1~24.04.1) also fixed the issue.
System info will be shared in the next comment(s).
Note: the issue is visible on a laptop I don't own, and I don't easily
have access. I tried to provide as much data as I could, but "quick
tests" might be difficult.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: gdm3 46.2-1ubuntu1~24.04.3
ProcVersionSignature: Ubuntu 6.8.0-86.87-generic 6.8.12
Uname: Linux 6.8.0-86-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.8
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 24 19:29:50 2025
InstallationDate: Installed on 2021-11-23 (1431 days ago)
InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.gdm3.custom.conf: 2025-10-24T19:28:32.230086
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