[Bug 89360] [bdw-u iommu] DMAR error -> GPU hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89360

--- Comment #44 from klondike <klondike at klondike.es> ---
(In reply to Chris Wilson from comment #43)
> (In reply to yann from comment #42)
> > *** Bug 98309 has been marked as a duplicate of this bug. ***
> 
> I would be careful not to mix gen8/gen9 reports for the moment, not until we
> have the root cause.

Well I pointed out early that one of the causes seems to be a conflict between
the UEFI framebuffer driver and the intel one, most likely because of some race
conditions or both trying to access the same hardware at the same time.

For me disabling the EFI framebuffer solved the issue so far so maybe other
reporters may want to test and see if that solves the issue for them too.

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