[Bug 103076] [v4.13 ARCH] GPU HANG: DMAR: DRHD: handling fault status reg 3 (arch reverted the use of intel_iommu=igfx_off)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103076

--- Comment #33 from Carsten Mattner <carstenmattner at gmail.com> ---
So after running the same workload which happened to provoke the hangs with
4.4, 4.13 and 4.14-drm-tip, I've been trying to get it to hang with 4.9.

Multiple days and still same good result with the state of DRM in 4.9.56.

The quickest was with 4.13, not even needing an hour before the workload
described above triggers the bugs.

4.14-drm-tip takes anywhere from 2 to 8 hours before the GPU hangs.

So I agree with Ivan, 4.9 has the most stable DRM right now and is sadly not
the extended LTS release, so either 4.4 needs a backport of 4.9 DRM or 4.14
fixes for the regressions. Not sure what is more likely to happen.

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