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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #101 from Ernest Hurtado <mqajjhfn at 10mail.org> ---
Before Linux 4.18 I could reproduce this bug on Broadwell and Skylake hardware.
On Linux 4.18 I can't reproduce this on Skylake anymore (after months of
testing). I can't test on Broadwell as my machine didn't lived as long as this
bug. I don't know which exact commits fixed this issue on Skylake and why it
doesn't work on Broadwell as other people reported.

BTW: on Linux 4.19rc1-3 iommu is broken again for graphics but this is
unrelated issue which is being worked on.

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