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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #107 from miguelramos <osorio at uniovi.es> ---
(In reply to Ernest Hurtado from comment #104)
> (In reply to miguelramos from comment #103)
> > This behaviour with previous kernels makes me suspect that the iommu
> > breakage in 4.19rc1-3 you mention has something to do with the problem in
> > Broadwell (at least in my laptop). 
> > 
> > Miguel Ángel
> 
> In the issue I mentioned the display wasn't working at all at boot (black
> screen), which is fixed in 4.19 stable release so I think this wasn't
> related to your problems.

You are right Ernest. 

And because of that, I conjecture that the problem that appears in my case for
the first time in kernel 4.19 might be related to the specific changes
implemented in the IOMMU support in kernel 4.19.

M. A.

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