Just an update - the problem got progressively more severe over days. So
I ordered a new keyboard and replaced it. The issue has now gone. So it
looks like this was a hardware issue. I have marked this bug report as
invalid.
** Changed in: gnome-shell (Ubuntu)
Status: Incomplete => Invalid
I re-installed Wayland and logged in with the Ubuntu on Wayland option
but it didn't fix the issue.
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https://bugs.launchpad.net/bugs/1922766
Title:
UP and DOWN
The only other devices I use with my laptop wireless with usb
transceiver or bluetooth and none have keys. Unfortunately I don't have
Wayland installed but I will go through the above bug to see what I can
infer (and probably install Wayland to test), but in the mean time I
have progressed a bit.
There isn't anything in top that looks like an issue, gnome-shell was at
the top with a about 9% CPU.
Disabling all extensions does not fix the issue.
I did see some errors in the systemd journal related to PCI, these
appeared a few seconds after trying to use the up and down keys.
Errors in
