[Bug 91127] Graphics problems with intel_iommu=on on Linux >= 3.7

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91127

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
If you look in drivers/char/agp/intel-gtt.c, you will find the function
needs_ilk_vtd_wa(). We need to work out why that is failing to match your
machine.

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