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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #49 from klondike <klondike at klondike.es> ---
I guess we both are experiencing different bugs with similar symptoms.

In my case at least, the UEFI display driver clashes with the Intel one
resulting in the IOMMU violations. This seems to be some kind of firmware bug
where the firmware isn't playing along with the MMU settings and Intel's
driver.

In yours, the cause may come from somewhere else, hopefully the devs can
provide more guidance on what is triggering your case, but if sleep is involved
chances are that firmware is somehow part of the issue.

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