[Bug 109219] iommu_intel=on + i915 incompatibility in 4.17, 4.19.13 and drm-tip

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109219

--- Comment #5 from Chris Wilson <chris at chris-wilson.co.uk> ---
Note that Ironlake igfx + iommu is known to be a bad mix -- the gpu cannot be
active while iommu is remapped, it seems doubtful that we are able to do that
or if that is the only workaround required.

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