I also have been encountering this issue. It's happened a few times now - it only happens after my machine has been up for a while.
I start to notice it when alt-tab takes a substantial proportion of a second to switch between windows. gnome-shell seems to be taking quite a bit of CPU time (10% to 30% cpu), but that's possibly just normal. I do have a network mount of a NAS drive, but it doesn't appear to be being probed (I would hear the NAS box spin up). I've attached the result of running the following commands: lspci -k > lspcik.txt gsettings list-recursively org.gnome.shell > settings.txt glxinfo > glxinfo.txt journalctl -b0 | tail -1000000 > journal.txt I see many Javascript type errors in the journal which might have something to do with the issue. As with the original poster, Alt-F2, then r fixed the issue (at least I have a workaround now!) and I don't see the regular JS errors appearing in the journal any more. ** Attachment added: "gnome.bug.zip" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1901017/+attachment/5452889/+files/gnome.bug.zip -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1901017 Title: Desktop gradually increases response lag to clicks in 20.04 (Fixed by Alt+F2, "r")) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1901017/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
