[Bug 276985] crash in LinuxKPI/drm

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276985

--- Comment #57 from Tomasz "CeDeROM" CEDRO <tomek@cedro.info> ---
* drm-510-kmod seems to work fine on 14.1-RELEASE-p4.
* removed drm-61-kmod and installed drm-510-kmod from ports without touching
the gpu-firmware-kmod package.
* all applications behave like in previous test of drm-61-kmod. obs have vaapi
hardware encoder. 3d acceleration in applications works fine. still some games
hangs the screen and input (i.e. openarena).


* the same issue as described in drm-61-kmod test with OpenArena happens also
on drm-510-kmod (desktop with RX580).
* this issue happens also with some other games that I have installed quickly
to test 3d acceleration. some games works fine. probably some resolution /
modeset change problem in drm?
* it does not hang the system as i thought before. i started some video in
firefox, launched the game, screens went blank, keyboard was unresponsive (no
ctrl+alt+f1, ctrl+alt+backspace, ctrl+alt+f1 then ctrl+c that usually switches
to a console and kills xorg), but i still had the audio playback from the
video, so the system was working in the background. after some time console
showed up with [drm] kind of errors but i did not catch them.
* this problem does not occur on 13.3-RELEASE with drm-515-kmod, the same
machine.

* i need to setup serial console to watch messages when screen is lost.

(so far) conclusions:
1. drm-510-kmod works on 14.1-RELEASE.
2. some applications crash drm (5.10, 6.1) when screen resultion needs change
(?).

next i will test 5.15 on 14.1 in a free moment.

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