I'm seeing something superficially similar in 20.04 desktop edition, in
a Dell workstation (i.e. h/w box, not a VM).
The desktop from time to time becomes extremely sluggish with long
delays for keystroke inputs and screen refreshes. e.g. we have chromium
pages with real-time clock displays, and
[Expired for gnome-shell (Ubuntu) because there has been no activity for
60 days.]
** Changed in: gnome-shell (Ubuntu)
Status: Incomplete => Expired
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Thank you for reporting this bug to Ubuntu.
Ubuntu GNOME 14.04 (trusty) reached end-of-life on April 28, 2017
https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes/UbuntuGNOME#Support
https://lists.ubuntu.com/archives/ubuntu-gnome/2017-March/004211.html
We appreciate that this bug may be old and you
