I have an ASUS X15 S532, CPU is i5-10210, "Comet Lake" chipset, with a
Intel Corporation CometLake-U GT2 [UHD Graphics] (rev 02); 
Subsystem: ASUSTeK Computer Inc. Device 1b51; 
PCI ID 8086:9b41; subsystem (PCI) 1043:1b51.  

I formerly had xf86-video-intel-2.99.917+git8674.25c9a2fcc-5.5.x86_64
which sometime around 2021-01-xx developed a weird and annoying bug, but
I didn't file a bug report because it's too hard to describe in a useful
way and it's probably highly hardware specific.  

I installed xf86-video-intel-3.0-4.2.x86_64.rpm from community developer
regataos (URL:
https://download.opensuse.org/repositories/home:/regataos/openSUSE_Tumbleweed/x86_64/xf86-video-intel-3.0-4.2.x86_64.rpm
)
The GPU is now working normally.  

Here's my best shot at a description, so possibly it could turn up in
web searches:

* When lightdm starts the session's X-server and renders its greeter,
you see the arrow cursor (centered, and moveable) but otherwise all
black.  Flip to VT1 (text appears), flip back, and the greeter is 
visible.

* When you move a window (the content being displayed during the move):
xlogo is filled with abstract art; xterm becomes all black except with
variable plug repetitions in the titlebar; and a TK window has
randomized content fragments.  Move another window such as xlogo over
it, or move the text cursor onto different lines, or flip VTs, and the
obscured or cursed area is re-rendered and becomes correct.

* When you make an xterm or a TK canvas scroll or insert/remove a text
line, you would expect the widget library to move a portion of the
canvas rather than re-rendering it, and this portion ends up mangled in
various ways.  Strangely, Firefox had no trouble with scrolling, either
direction.

Thanks to regataos for posting the RPM of the v3.0 driver.  Could the
triage person please add him/her to the CC list?  (I don't know what
address to use for a community dev.)  And could OpenSuSE please consider
expediting an upgrade of the official package?  Thanks.

By the way, bug 1179387 looked like it might be similar to this one, but
it's for a Pentium III "Coppermine" with Radeon 9000 AGP.  I had one
also, and it was a great machine, but it's kind of at the opposite end
of history, not really related to this bug.