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Upgraded from 17.10 to 18.04. The gnome shell constantly spikes to >200% cpu usage and is especially bad when heavy interaction with the Xorg window manager occurs (web browsers, vlc media player, etc.). GPU is fine at <2% (GTX 1070 with Nvidia 390 drivers).

Restarting gnome-shell temporarily fixes the issue, but it resumes sporadic behavior after several minutes. When this occurs, the system is barely usable as frame rate dips to <5 fps.

Also tried updating BIOS. No effect.

Any ideas for a solution for restoring system stability?

Jclangst
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  • Facing the same issue, yet the accepted answer did not solve it, unfortunately. Any other ideas? Is it maybe because I have nvidia AND Intel HD graphics? – rob Aug 17 '20 at 06:29

1 Answers1

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I have updated from 17.10 as well, and I started getting those crazy 5 fps interface lags and high CPU usage by gnome-shell - it helped me to run ubuntu-drivers autoinstall, which fetched and updated nvidia drivers

dimitrii_n
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    That worked like a charm! It appears that for whatever reason the gpu was not being utilized by gnome-shell as now gnome stays <=25% cpu and gpu is at a nice 5% avg utilization. Additionally, running nvidia-smi shows that gnome-shell is actually utilizing the gpu as opposed to before when it just showed Xorg.

    Any thoughts on why this fixed it? I already had the 390 drivers installed before (directly from Nvidia's website).

     – Jclangst May 18 '18 at 14:27
  • Yeah, same situation - had 390 drivers installed before (on 17.10), but they didn't work properly with gnome-shell before this command. Don't know why – dimitrii_n May 22 '18 at 12:50