It doesn't look like "most" of the time. The screenshot shows the
machine has been up 26 days and that gnome-shell process has consumed
641 minutes of CPU, which is less than 7 hours.
It's definitely a bit strange, but not most of the time. It's only
consumed about 2% of the machine's CPU time sin
Thank you for taking the time to report this bug and helping to make
Ubuntu better. The issue you are reporting is an upstream one and it
would be nice if somebody having it could send the bug to the developers
of the software by following the instructions at
https://wiki.ubuntu.com/Bugs/Upstream/G
