Reverting to nouveau driver leaves dead nvidia links causing suspend and shutdown to fail

[Jeff]

After having problems with the nvidia driver 470, I reverted to the nouveau driver, only to find that using suspend or shutdown in the XFCE4 menu just returned to the login page. However, I found that using the 'shutdown' or 'pm-suspend' commands worked OK.

Checking syslog after a failed suspend lead me to /etc/systemd/system directory:

lrwxrwxrwx 1 root root 9 Aug 25 15:04 nvidia-hibernate.service -> /dev/null
lrwxrwxrwx 1 root root 9 Aug 25 15:04 nvidia-resume.service -> /dev/null
lrwxrwxrwx 1 root root 9 Aug 25 15:04 nvidia-suspend.service -> /dev/null

Also, there were two directories containing links to the above 'masked' services. Deleting those links restored suspend and shutdown functionality.

drwxr-xr-x 2 root root 4096 Aug 26 18:14 systemd-hibernate.service.requires/
drwxr-xr-x 2 root root 4096 Aug 26 18:08 systemd-suspend.service.requires/

Obviously a problem in removing all the nvidia settings.