Gdm does not start anymore on 20.04

[Michel-Ekimia]

After a reboot GDM3 does not start anymore .

I could install lightdm and see that login to gnome ( Ubuntu session ) either on XOrg or wayland mode does not work as well.

I don't think any of my ppa can generate this problem.

XFCE works fine.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gdm3 3.36.3-0ubuntu0.20.04.4
ProcVersionSignature: Ubuntu 5.11.0-36.40~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-36-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Sat Sep 25 12:31:28 2021
InstallationDate: Installed on 2020-08-13 (407 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.gdm3.custom.conf: 2021-09-25T12:11:41.629180
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
CasperMD5CheckResult: skip
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2020-08-13 (407 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
Package: gdm3 3.36.3-0ubuntu0.20.04.4
PackageArchitecture: amd64
ProcEnviron:
 LANGUAGE=fr_FR
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 5.11.0-36.40~20.04.1-generic 5.11.22
Tags: third-party-packages focal
Uname: Linux 5.11.0-36-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
_MarkForUpload: True
modified.conffile..etc.gdm3.custom.conf: [modified]
mtime.conffile..etc.gdm3.custom.conf: 2021-09-25T12:11:41.629180

[Daniel van Vugt (vanvugt)]

gdm is an invisible daemon you don't observe directly and the syslog in comment #4 shows it is working fine. What isn't working there is gnome-shell:

Sep 25 09:59:09 michel-slim-ekimia kernel: [ 156.762025] traps: gnome-shell[23369] trap int3 ip:7fcbcbecf295 sp:7fff2dcfedd0 error:0 in libglib-2.0.so.0.6400.6[7fcbcbe93000+84000]
Sep 25 09:59:09 michel-slim-ekimia gnome-shell[23369]: Settings schema 'org.gnome.mutter.x11' is not installed
Sep 25 09:59:09 michel-slim-ekimia systemd[14684]: gnome-shell-x11.service: Main process exited, code=dumped, status=5/TRAP
Sep 25 09:59:09 michel-slim-ekimia systemd[14684]: gnome-shell-x11.service: Failed with result 'core-dump'.

[Daniel van Vugt (vanvugt)]

The problem is that you are missing (or have broken):

  /usr/share/glib-2.0/schemas/org.gnome.mutter.x11.gschema.xml

due to the custom install of:

  mutter-common 3.38.4-1 [origin: WayDroid]

[Michel-Ekimia (michel.ekimia)]

Thanks Daniel , Will try to remove waydroid , which was not working anyway

[Michel-Ekimia (michel.ekimia)]

Thanks that is the way droid repo that broke .
I fixed it by restoring the ubuntu repo version.