[Bug 261773] graphics/drm-fbsd13-kmod: Instability and artifacts after 5.4.144.g20220128 update (Intel GM45)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261773

Stefan B. <sblachmann@gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |sblachmann@gmail.com

--- Comment #19 from Stefan B. <sblachmann@gmail.com> ---
Can confirm the corruption too.
It today happened after a long install run with my still inofficial alpha
SkunkInstaller [*] finished, which installed xorg, KDE, Gnome, Mate and all
selectable applications and then started xorg directly afterwards.
So there was some previous system load, definitely some gigabytes ZFS activity.

System is T520, 16GB RAM, 960GB SSD, guided ZFS-on-root with default 2GB swap
partition, FVWM as my selected default WM/DM, 13-RELEASE-p7, "latest" repo,
drmkmod 5.4.144.g20220128

Photos in attachments following.

Directly after (re)booting, without previous system loading, I was unable to
reproduce that again.
I guess I will let run the system overnight with many apps open, including
Firefox with some javascript heavy pages to see if this comes back.


@ Cy Schubert:
Do these artifacts also appear when there is heavy read-only ZFS activity? Or
only when there is write activity?

Whatever, the corruption is nasty!
As it is, it would present itself to the user directly after installation
finished and X started up.
This is a kind of "first impression" I do not want to offer the new FreeBSD
users...


@ Tjil Coosemans
Did the issue reappear with your patch, or were you unable to reproduce it
since?

Or are the changes that @ Charlie Li and @ Oleh Vinichenko mentioned a more
probable "solution"?


[*] https://github.com/SkunkOS/SkunkInstall

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