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'. ** Package changed: gdm3 (Ubuntu) => gnome-shell (Ubuntu) -- 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/1945047 Title: Gdm does not start anymore on 20.04 Status in mutter package in Ubuntu: Invalid Bug description: 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1945047/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
