On Thu, 16 Jan 2025 08:14:34 -0500, Steve wrote in message
<20250116081434.29e03545@???>:

> Haines Brown via Dng said on Thu, 16 Jan 2025 07:20:55 -0500
>
> >Bottom half of display is black or flickering grey cloud. In top
> >half, black lines start to dislay in mid dislay and eventuallhy
> >reach top. Faint images of text I was working on yesterday is
> >supermimposed. One virtual desktop can't be accessed and instead
> >displays another.

..can't be adressed, or doesn't appear to respond? Try drop
e.g. oclock -geometry into-the-bad-half-of-your-display there,
man oclock for details, you may want it colorful.

> >Mouse and keyboard operate normally.
> >
> >My intuitiion was that this is an X window system problem, but
> >reinstalling then did not help. is it the motherboard? When I boot
> >to another drive the problem appears with it as well
>
> T R Y A N O T H E R M O N I T O R !

...or monitor cable. Re-setting the cable connectors might be enough.

>
> Intuition plays a role, but the quadruple tradeoff in picking your
> next diagnostic test is, in no particular order:
>
> * Ease
> * Likelihood
> * Even divisions
> * Safety
>
> Don't do unsafe tests, period, if they risk bodily injury, legal
> jeopardy, or substantial expense.
>
> Assuming you have another monitor with the same kind of input, the
> easiest thing in the world is to try the other monitor and see if the
> problem goes away. If it does, try the monitor displaying the problem
> on another computer. If the same problem occurs on the other computer,
> you've 99% implicated either the monitor or its cable.
>
> By the way, *my* intuition commands me to ask this question: Are you
> using an nVidea video card?

..these use the nouveau or NVIDIA Corporation's nvidea driver.
Chk with e.g. lshw |less

..try backing off/down on your screen resolution. If your problem
"goes away", you're "asking too much" of your current video setup.

..revert to your last working setup and start diagnosing from
there, you _may_ have found new a bug.


--
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
Scenarios always come in sets of three:
best case, worst case, and just in case.