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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #112 from Yves-Alexis <corsac at debian.org> ---
(In reply to miguelramos from comment #102)
> I can confirm that the problem still affects Intel Broadwell 5500 (gen 8)
> that needs the workaround in kernel 4.19.2 using gentoo-sources and
> vanilla-sources in Gentoo Linux to start "gdm" without suffering a Intel GPU
> hang.
> 
> dmesg clearly shows that the problem with DMAR hangs the Intel GPU.

So I tried removing igfx_off in (Debian) 4.19 kernel (BDW) and it sure still
doesn't work. It might be a different bug than before but I still have to use
that option.

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