[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 #44 from Carsten Mattner <carstenmattner at gmail.com> ---
(In reply to Carsten Mattner from comment #43)
> (In reply to Carsten Mattner from comment #42)
> > With 4.13.2 entering Xorg and leaving results in a failed atomic flip which
> > then 2/3 of the time makes it impossible to restart the kernel cleanly.
> > 
> > This doesn't happen if a Wayland compositor is used and exited.
> 
> It's this atomic error: "flip_done timed out" when you exit Xorg.
> 
> There have been other updates in Arch Linux and if I try hard I can
> reproduce it on 4.9.61 as well now.

Adding video=SVIDEO-1:d to the kernel cmdline seems to fix the flip_done hang.

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