On Sun, 19 Dec 2021 10:39:59 -0500
Haines Brown <haines@???> wrote:

> I apologize for the slowness of my reply to all the valuable
> suggestions. I've worked around the display problem, but thought best
> to address some of the suggestions because it is only a work around,
> not a fix.
>
> I gather from users of the 78.15.0esr version of Firefox that the video
> problem is not with that version. This is good to know.
>
> I assume it is not a video driver problem for that display issue occurs
> only with Firefox, not with other graphics intensive applications or
> browsers.
>
> I'm unsure how to approach a problem with video sync, but as best I can
> make out the display issue occurs with all the URLs I visit. I purged my
> old Firefox and reinstalled without its having access to old cache and
> the problem persisted.
>
> Wasn't able to do the memtest86+ because of the press of work, but
> it is a good idea to do when I get a chance even though I have worked
> around then Firefox display problem.
>
> It does seem to be a refresh problem. If I open a terminal on top of the
> browser's page display and them move the terminal it away, the lines
> that has been under the termoinal break up one second. I have no ideal
> how one fixes such a problem in a particular application.
>
> Turning off smooth scrolling had no effect.
>
> Turning now to my work aroud. My theory had been that my browser was
> upgraded when I did a general update/upgrade perhaps a month ago. But
> about that time I also temporarly chagne zoon. So I want back to an
> earlier version of Firefox. Not sure what version was using and so
> arbitrarily downloaded Firefox 7.0.1. Turns out this version has no
> display distortion.
>
> Emboldened I also downloaded a new version of Firefox: 95.0.1. Much my
> suprrise this ran out of the box. No dependency issues. It also does not
> have the display problem. So I'll try to migrate to it as my default
> browser if I can.
>

Hi,
one thing you could try is to turn off compositing in the display settings
this used to help to fix similar screen corruption issues for me.

Ciao,
Tito