[Intel-gfx] [PATCH 1/2] drm/i915: re-enable semaphores by default
keithp at keithp.com
Wed Nov 16 13:37:10 PST 2011
On Wed, 16 Nov 2011 21:18:13 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> Last time I've played around with all the combinations, only
> intel_iommu=off was good enough to prevent the hang.
> intel_iommu=igd_off still hangs (which is what the current value
> exported by the dmar code dopends on, iirc). If I remember things
> correctly, intel_iommu=off also reliably works around issues for all
> reporters (both semaphores and rc6).
So, the dmar_disabled flag would suffice? Should be trivial to export
that and check in our driver.
keith.packard at intel.com
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