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Message #06903
[Bug 2122294] Re: gnome-session-init-worker crashes with SIGTRAP (Failed to start unit gnome-session-x11@gnome-login.target: ...: Unit gnome-session-x11@gnome-login.target not found.)
@Daniel, what this command should do `grep -rl 'gnome-session-x11' /etc
/usr | sort`?
In /etc I didn't find any reference to this string, and I filtered files with this name under /usr:
```
➜ find /usr|grep -i 'gnome-session-x11'
f:=find
/usr/lib/systemd/user/gnome-session-x11-services-ready.target
/usr/lib/systemd/user/gnome-session-x11-services-ready.target.wants
/usr/lib/systemd/user/gnome-session-x11-services-ready.target.wants/org.gnome.SettingsDaemon.XSettings.service
/usr/lib/systemd/user/gnome-session-x11-services.target.wants
/usr/lib/systemd/user/gnome-session-x11-services.target.wants/org.gnome.SettingsDaemon.XSettings.service
/usr/lib/systemd/user/gnome-session-x11-services.target
```
About the other command I got:
```
➜ grep -r gnome-login.target /usr/lib/systemd
/usr/lib/systemd/user/org.freedesktop.IBus.session.GNOME.service:Conflicts=gnome-session@gnome-login.target
```
I will check what package has this first .target files and check if I can delete them/remove the package.
I also will edit /etc/gdm3/custom.conf and edit to comment that line.
IIRC I got the error and then I edit it because I thought X11 was being called and then I should force Wayland, even it was the default.
--
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https://bugs.launchpad.net/bugs/2122294
Title:
gnome-session-init-worker crashes with SIGTRAP (Failed to start unit
gnome-session-x11@gnome-login.target: ...: Unit gnome-
session-x11@gnome-login.target not found.)
Status in gdm3 package in Ubuntu:
Triaged
Status in gnome-session package in Ubuntu:
Won't Fix
Bug description:
I restarted my machine today, and it was odd how long took to GDM appears. For some reason it seems it was in a crash loop. Normally after the boot it appears turning on my external display, and than appears the GDM. But this time it entered in a loop turning on and off my external display.
I can say that because appears an OSD written "HDMI 2" when it turns on the display.
I hope the logs can give you more details about it.
ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: gdm3 49~rc-0ubuntu1
ProcVersionSignature: Ubuntu 6.17.0-3.3-generic 6.17.0-rc3
Uname: Linux 6.17.0-3-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.33.1-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Sep 7 14:45:45 2025
InstallationDate: Installed on 2021-11-26 (1381 days ago)
InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
SourcePackage: gdm3
UpgradeStatus: Upgraded to questing on 2025-08-25 (13 days ago)
mtime.conffile..etc.gdm3.custom.conf: 2025-09-07T13:52:05.225338
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