[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 #40 from Carsten Mattner <carstenmattner at gmail.com> ---
(In reply to Ivan Linty from comment #39)
> Carsten, not sure we are speaking about same issue at this point...

I'm talking about the GPU hangs. If I understand you correctly, you say that
with those kernel flags you can't provoke hangs anymore.

My observation is that 4.13 and newer is still susceptible if you test long
enough with a mix of CPU and GPU use. The original, immediate hang reported by
Arch Linux users is fixed by not enabling DMAR by default, but I cannot make
4.9.59 GPU hang no matter how hard I try. With 4.13 (no DMAR) and newer it's
easy, but takes a little time.

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