[Bug 104891] [CFL] GPU hang during VA-API H.264 encoding

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104891

--- Comment #3 from Steinar H. Gunderson <sgunderson at bigfoot.com> ---
OK, so I booted with alpha_support=1. This gives me

[    6.119181] i915 0000:00:02.0: firmware: failed to load
i915/kbl_dmc_ver1_01.bin (-2)
[    6.119185] i915 0000:00:02.0: Direct firmware load for
i915/kbl_dmc_ver1_01.bin failed with error -2
[    6.119186] i915 0000:00:02.0: Failed to load DMC firmware
i915/kbl_dmc_ver1_01.bin. Disabling runtime power management.
[    6.119187] i915 0000:00:02.0: DMC firmware homepage:
https://01.org/linuxgraphics/downloads/firmware

but I suppose it's noncritical.

VA-API still does not work; just GPU hang like before.

I looked at 104377, but I'm not entirely sure what to infer from it. The
installation is almost entirely the same as on my Haswell, where VA-API _did_
work (I replaced motherboard/CPU/RAM, everything else is exactly the same); I
had to upgrade from 4.14 to 4.15 to get CFL support at all, but everything else
is in the same version. In particular, I haven't upgraded or downgraded Mesa,
and Mesa isn't really in effect here anyway, since OpenGL is handled by the
NVIDIA.

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