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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #46 from klondike <klondike at klondike.es> ---
(In reply to Mads from comment #45)
> (In reply to klondike from comment #44)
> > 
> > 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.
> 
> I've neither had efifb nor fbsimple enabled on my XPS 15 9550, but I didn't
> get rid of this problem until I added "intel_iommu=igfx_off" to my bootargs.

Interesting, it seems then that there is more than one different instance of
this bug then. Do you have any other FB or driver that interacts with the intel
card other than the Intel's modesetting one? The VGA console could be one such
driver.

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