[Bug 107240] [FreeBSD][Braswell] - GPU HANG error at boot using drm-next-kmod under FreeBSD 11.2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107240

--- Comment #6 from Johannes Lundberg <johalun0 at gmail.com> ---
(In reply to Dan MacDonald from comment #5)
> Created attachment 140987 [details]
> tarball of various ubuntu 18.04 log files - xorg, dmidecode, mpv, dmesg etc
> 
> tarball of various ubuntu 18.04 log files - xorg, dmidecode, mpv, dmesg etc
> 
> With the hardware detailed in the attached logs, I can play the UHD MP4 file
> smoothly at full UHD res on my UHD display with in-sync audio (both being
> sent over the DVI to HDMI cable) under the Ubuntu 18.04.1 build of mpv. I
> would like to be able to do the same under FreeBSD with the same hardware,
> sound optional. I would be happy just to get the vaapi hardware decoding
> working under FreeBSD, I'm not as concerned about HDMI audio right now.

Hi

I'm the guy doing most work currently on drm drivers for FreeBSD. For any bugs
that are not obviously also occurring on Linux, please report an issue at
https://github.com/FreeBSDDesktop/kms-drm . You can also reach the FreeBSD
graphics team on our mailing list freebsd-x11 at freebsd.org or gitter
https://gitter.im/FreeBSDDesktop/Lobby .

With our drm-stable-kmod package (which is Linux 4.9) rendering with VAAPI
works fine. In later version however, it does not. It's been very hard to track
down what is causing this. 

As for the crash I have no idea.. I recommend drm-stable-kmod with modesetting
ddx (uninstall xf86-video-intel). However, if the tearing is too bad for your
use case, you might have to use the Intel ddx with tearfree option...

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