Comment 4 for bug 1758243

Rocko (rockorequin) wrote :

@Roman: it might be the systemd nvidia-fallback, which loads nouveau if the nvidia driver isn't loaded. I'm seeing this problem now even with my 'alias nouveau off' setting:

$ systemctl status nvidia-fallback.service
● nvidia-fallback.service - Fall back on nouveau if nvidia is not loaded
   Loaded: loaded (/lib/systemd/system/nvidia-fallback.service; enabled; vendor preset: enabled)
   Active: active (exited) since Wed 2018-04-25 08:47:30 AWST; 16min ago
  Process: 1013 ExecStart=/sbin/modprobe nouveau --config / (code=exited, status=0/SUCCESS)
 Main PID: 1013 (code=exited, status=0/SUCCESS)

Apr 25 08:47:29 xps15-9560 systemd[1]: Starting Fall back on nouveau if nvidia is not loaded...
Apr 25 08:47:30 xps15-9560 systemd[1]: Started Fall back on nouveau if nvidia is not loaded.

You could try doing:

systemctl disable nvidia-fallback.service

and rebooting to see if that fixes the problem.