On Tue, 19 Nov 2019 at 14:58, Tom Horsley <horsley1953@gmail.com> wrote:
On Tue, 19 Nov 2019 14:42:51 -0400
George N. White III wrote:

> The EFI message was introduced long ago.    Has USB3
> port usage changed since you upgraded to Fedora 31?

Nope. The only thing different on both these systems
is fedora 31. At least it only happens every few hours
(or even days), so it isn't constantly changing my
mouse buttons and it is easy to re-run the xinput
commands I have in a script when it does happen.\

EFI is looking like a red herring.   Next on the list of
suspects with access to both systems is power
management.   Have a look at USB Power Management for Linux 5.3
(hasn't changed over many kernel versions).   A good first step would
be to disable USB PM and see if the issue goes away.

Although USB PM has been fairly stable, power management changes
are being made in other parts of the kernel, so collateral damage is a
possibility.




--
George N. White III