Thanks for the bug report.
The two most likely causes of this problem are:
* Shell extensions
* Chrome tabs
so you should check each of those separately...
Please delete locally installed shell extensions by running:
cd ~/.local/share/gnome-shell/
rm -rf extensions
and then log in again.
Please also try just closing Chrome when it happens. Does the system
recover?
After you have closed Chrome and deleted all local shell extensions, if
the problem persists then next please provide output from 'top' and 'ps'
while the problem is happening to show the top CPU and memory users.
** Changed in: gnome-shell (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2004063
Title:
mouse pointer becomes laggy after some time and progressively gets
worse
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https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/2004063/+subscriptions
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