On 03/04/18 08:25, Stephen Morris wrote:
My issue starts with gdm, with gnome shell taking up to 800% of the cpu and causing, ctrl+alt+F2 to switch to another login to time out, and if I launch gnome from gdm the issue with gnome shell continues and causes gnome itself to lag. If I log into kde from gdm instead of logging into gnome the performance issue ceases and things go back to normal. If I use kdm as the display manager, launching kde does not cause any performance issues, and, if I launch gnome from kdm there are no performance issues either, with gnome shell running normally and not thrashing the cpu, so from my perspective the issue is gdm. The next question is how do I fix it?
Are you running GNOME under wayland or Xorg?
Could be this. https://bugzilla.redhat.com/show_bug.cgi?id=1517330