You have been subscribed to a public bug:
Shutdown from Gnome and `sudo shutdown -h now` stopped working in Ubuntu
20.04.4 LTS.
I have xserver-xorg-video-nvidia-510 installed.
journalctl bottom shows
```
march 09 15:45:13 myhost systemd[1]: basic.target: Found ordering cycle on
nvidia-persistenced.service/stop
march 09 15:45:13 myhost systemd[1]: basic.target: Found dependency on
systemd-backlight@backlight:nvidia_0.service/stop
march 09 15:45:13 myhost systemd[1]: basic.target: Found dependency on
sysinit.target/stop
march 09 15:45:13 myhost systemd[1]: basic.target: Found dependency on
acpid.path/stop
march 09 15:45:13 myhost systemd[1]: basic.target: Found dependency on
paths.target/stop
march 09 15:45:13 myhost systemd[1]: basic.target: Found dependency on
basic.target/stop
march 09 15:45:13 myhost systemd[1]: basic.target: Job
nvidia-persistenced.service/stop deleted to break ordering cycle starting with
basic.target/stop
march 09 15:45:13 myhost systemd[1]: Requested transaction contradicts existing
jobs: Transaction for poweroff.target/start is destructive
(nvidia-suspend.service has 'start' job queued, but 'stop>
march 09 15:45:13 myhost systemd-initctl[201461]: Failed to change runlevel:
Transaction for poweroff.target/start is destructive (nvidia-suspend.service
has 'start' job queued, but 'stop' is incl>
```
** Affects: nvidia-graphics-drivers-510 (Ubuntu)
Importance: Undecided
Status: New
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ordering cycle on nvidia-persistenced.service/stop - unable to shutdown
https://bugs.launchpad.net/bugs/1964352
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