I'm having a problem starting the GUI on several kernels - now for a while and it is getting more severe now:
The general problem is, that the boot of the system stops at the point when starting lightdm (same problem exists for gdm). This isn't true for all kernels, but the last one that worked was
uname -a
Linux bs-L 5.4.0-96-generic #109-Ubuntu SMP Wed Jan 12 16:49:16 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
To overcome this problem I did now a release-upgrade - which was a mistake obviously. On the kernel 5.15.0.56 it soesn't work, similar to 5.4.0-131, 5.4.0-132 or 5.4.0-135.
Since the new release has problems with the old kernel versions, now some things don't work anymore. So the problem becomes more urgent.
So, in the syslog I find the following things on lightdm:
Dec 5 08:43:49 bs-L lightdm[4571]: Seat type 'xlocal' is deprecated, use 'type=local' instead
Dec 5 08:43:50 bs-L systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Dec 5 08:43:50 bs-L systemd[1]: lightdm.service: Failed with result 'exit-code'.
Dec 5 08:43:50 bs-L systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 5.
Dec 5 08:43:50 bs-L systemd[1]: Stopped Light Display Manager.
Dec 5 08:43:50 bs-L systemd[1]: gpu-manager.service: Start request repeated too quickly.
Dec 5 08:43:50 bs-L systemd[1]: gpu-manager.service: Failed with result 'start-limit-hit'.
Dec 5 08:43:50 bs-L systemd[1]: Failed to start Detect the available GPUs and deal with any system changes.
Dec 5 08:43:50 bs-L systemd[1]: lightdm.service: Start request repeated too quickly. Dec 5 08:43:50 bs-L systemd[1]: lightdm.service: Failed with result 'exit-code'.
Dec 5 08:43:50 bs-L systemd[1]: Failed to start Light Display Manager.
Has anyone an idea on howto overcome this problem?