I recently updated to 20.04 LTS from 18.04 LTS.
When my system is up for like a day, alt-tab starts to lag. Not the window switcher panel, but when I select the window I want and release keys, it takes maybe a second to switch.
Rebooting or restarting gnome with
killall -SIGQUIT gnome-shell fixes it back.
I also noticed gnome-shell was constantly at ~10% CPU while after restart, it's ~3%. Not sure if related.
I couldn't find anything about this problem. Any ideas on how can I fix, or further troubleshoot this?
GNOME Shell 3.36.2<br> nvidia-driver-440<br> 5.5.13-050513-generic