Pointing devices and most of keyboard stop working on 20.10 system

[Bret Busby]

Hello.

On a UbuntuMATE 20.10 system, after I reboot the computer, which I
have to do now, every session, after about 5-10 minutes of
deteriorating use, the mouse dominant button stops working, then,
after a while, the non-dominant button stops working; this is for a
"laptop" computer, and, the buttons on the trackpad then are not
working, and the "F" buttons on the external keyboard, and the
<CTRL><alpha character> combination (eg, <CTRL><q>), does not work,
and, about all I can do is use the <CTRL><ALT><DEL> combination, to go
to a shutdown or reboot.

If I reboot the sytem, and, leave it standing, with no applications
opened, it deteriorates as described above, after a few minutes.

How do I find what is happening with the operating system?

-- 
Bret Busby
Armadale
West Australia
(UTC+0800)
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