Re: [PATCH] iommu/intel: disable DMAR for Q35 integrated gfx

[David Woodhouse]

On Mon, 2016-12-05 at 14:18 -0800, Kees Cook wrote:
> Hm, I have no idea. :) What would I look for in the BIOS?

For a start, what is the actual failure mode?

> I figured since g4 was busted, surely q35 was too, since it's even
> older...

Oh no, they all have different failures. Intel never actually *tested*
their graphics hardware before shipping it, but IIRC it was only Q4x
where we concluded the hardware was just too broken to live.