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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #45 from Mads <mads at ab3.no> ---
(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.

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