GPU hang on ThinkPad T420 with drm-kmod on 12.0-RELEASE

[Kevin Zheng]

On 1/4/19 7:10 PM, Kevin Oberman wrote:
> Have you examined xorg.0.log to confirm which driver is actually 
> running? Do you have multimedia/libva-intel-driver installed? If so, is 
> HYBRID enabled in the configuration? I had hangs with it in the past, 
> but it's been working for over two days now with a recent 12.0-STABLE 
> (r342382),mesa-18.3.1 and modesetting. Also, I run with SCHED_4SD, not 
> the default SCHED_ULE scheduler.

Every once in a while, I still get:

[drm] GPU HANG: ecode 6:0:0x85fffff8, in supertuxkart [101085], reason: 
Hang on rcs0, action: reset
drmn0: Resetting chip after gpu hang

My drm, when loaded, also does this:

Failed to add WC MTRR for [0xe0000000-0xefffffff]: -28; performance may 
suffer

This might only be tangentially related, if at all. But, does anyone 
else see this when you load i915?

-- 
Kevin Zheng
kevinz5000 at gmail.com | kevinz at berkeley.edu | PGP: 0xC22E1090