[Intel-gfx] [PATCH] drm/i915: Disable all outputs early, before KMS takeover

[Daniel Vetter]

On Tue, Mar 29, 2011 at 11:46:29AM +0100, Chris Wilson wrote:
> If the outputs are active and continuing to access the GATT when we
> teardown the PTEs, then there is a potential for us to hang the GPU.
> The hang tends to be a PGTBL_ER with either an invalid host access or
> an invalid display plane fetch.

This patch seems to fix resume flakiness (that recently developed
complete reliability in hanging the gpu) on my i855gm. Captured
error_states look as described here. Latest -staging merged into latest
-linus is now again fully reliable at s/r.

Tested-by: Daniel Vetter <daniel.vetter at ffwll.ch>
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48