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?
Best Answer
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