Re: [Intel-gfx] kernel BUG at drivers/gpu/drm/i915/i915_gem

[Keith Packard]

On Fri, 16 Dec 2011 17:38:39 +0100, tino.keitel+xorg@xxxxxxxx wrote:

> Hum, could this be related to the RC6 vs. IOMMU issue? I have
> CONFIG_INTEL_IOMMU enabled in 3.2, and disabled in 3.1, and boot with
> i915.i915_enable_rc6=1.

Very likely -- RC6 and semaphores are not compatible with IOMMU. You
should be able to just disable VTd in your BIOS and use the kernel with
IOMMU enabled.

-- 
keith.packard@xxxxxxxxx

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