Moved to Private so only the original reporter (JPM) can reply.
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https://bugs.launchpad.net/bugs/1880723
Title:
gnome-shell high CPU
Dan,
Please report your own bug.
This one was due to expire in 10 days.
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Title:
dantheperson, the problem you describe is bug 1880405.
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Title:
gnome-shell high CPU usage
lspci
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https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+attachment/5393305/+files/lspcik.txt
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I'm seeing something very similar.
Did a fresh install of 20.04 a week ago.
After being logged in half a day things really start slowing down.
Alt+Tab takes a few seconds to pop up, then you tab through to e.g. an
open Calculator instance and that takes 8 seconds to come to the
foreground.
** Attachment added: "Screenshot from 2020-07-17 15-33-50.png"
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1880723/+attachment/5393306/+files/Screenshot%20from%202020-07-17%2015-33-50.png
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> Looking at htop I can see gnome-shell takes anywhere between 5% and
50% of CPU, normally between 10% and 20%.
This is a little too vague for us to be able to action right now, but I
can suggest checking a few things that commonly cause high CPU for other
people:
1. Uninstall all non-Ubuntu
After an update and restart, switching desktops feels snappy again.
Looking at htop the cpu usage is still higher than expected. And strace
still shows many errors:
jpmeijers@jpmeijers-XPS13-9333:~$ sudo strace -c -p 2217
[sudo] password for jpmeijers:
strace: Process 2217 attached
^Cstrace:
After logging out and back in the CPU usage seems lower, but without anything
but a terminal open gnome-shell is still the biggest user of the CPU at around
1-2% continuously. After gnome-shell the second highest user is:
Xorg vt2 -displayfd 3
I see there is an update for gnome-shell, so I will
