This looks like a problem with the 'nouveau' kernel driver.
First we need to check to see if it's already fixed in a newer version
so please try booting Ubuntu 20.04.1 or 18.04.5 from
https://releases.ubuntu.com/
** Tags added: nouveau
** Summary changed:
- freeze display and no more toothead wheel high&right of the screen for
parameters
+ [nouveau] freeze display and no more toothead wheel high&right of the screen
for parameters
** Package changed: xorg (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: linux (Ubuntu)
Status: Incomplete => New
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1897295
Title:
[nouveau] freeze display and no more toothead wheel high&right of the
screen for parameters
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