[Bug 101288] [skl] GPU HANG: ecode 9:0:0x85dffffb, in Xorg [836], reason: Hang on render ring, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101288

--- Comment #10 from Bjørn Mork <bjorn at mork.no> ---
Thanks.  testing now with a plain v4.16, which includes that commit AFAICS, and
the latest i915/skl_dmc_ver1_27.bin from linux-firmware.git.  Please let me
know if I got anything wrong here:

root at miraculix:/home/bjorn# dmesg |grep drm
[    4.624336] fb: switching to inteldrmfb from simple
[    4.630129] [drm] Replacing VGA console driver
[    4.633901] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    4.633924] [drm] Driver supports precise vblank timestamp query.
[    4.637091] [drm] Finished loading DMC firmware i915/skl_dmc_ver1_27.bin
(v1.27)
[    4.704297] [drm] Initialized i915 1.6.0 20171222 for 0000:00:02.0 on minor
0
[    4.748850] fbcon: inteldrmfb (fb0) is primary device
[    6.232211] [drm] Reducing the compressed framebuffer size. This may lead to
less power savings than a non-reduced-size. Try to increase stolen memory size
if available in BIOS.
[    6.275291] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device


Will be back with a report in a couple of weeks.  The hangs are very
infrequent, so I consider that a minimum test period for an acceptable
confidence level.  But it does look good this far ;-)

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