Public bug reported:
After a day or so of uptime, system will grow quite sluggish to respond
to mouse clicks. Clicking on an app in the dock with multiple windows
will lag up to 1 second, clicking different windows will do the same.
Curiously, right clicking on the desktop takes longer, sometimes over 2
seconds for the menu to appear. Clicking the Calendar/Notification area
and other areas of the shell yield the same issue.
Actual drawing performance does NOT seem to be affected, as browsing and
in-application clicking is still snappy. Highlighting icons by hovering
over the dock is also real-time.
This has reliably occurred after more than a day of uptime on multiple
occasions. My machine is a Ryzen 3600 with 32GB RAM and an NVIDIA 1050Ti
(Proprietary driver) No unusually high CPU usage is found, nor is there
anything that seems to be using very much RAM.
Using Alt+F2 and "r" to restart mutter instantly restores responsiveness
Current version of mutter is 3.36.6
** Affects: mutter (Ubuntu)
Importance: Undecided
Status: New
** Tags: 20.04 click lag mutter responsiveness
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https://bugs.launchpad.net/bugs/1901017
Title:
Desktop gradually increases response lag to clicks in 20.04 (Fixed by
Alt+F2, "r"))
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