[Intel-gfx] [PATCH] drm/i915: fix transition to I915_TILING_NONE

[Mike Lothian]

2009/4/16 Colin Guthrie <intel at colin.guthr.ie>:
> 'Twas brillig, and Keith Packard at 16/04/09 23:17 did gyre and gimble:
>> Transitions to TILING_NONE skipped the call to unbind the object, which left
>> the fence register set and caused future CPU access through the GTT to
>> access the object in tiled mode.
>
> Could this solve this problem:
> http://thread.gmane.org/gmane.comp.freedesktop.xorg/38493
>
> Sorry if this is totally unrelated.

Well if it is related it doesn't fix it for me I'd just sent an e-mail
to the list about the issue a minute before you sent this patch

However I'd like to point out with 2.6.29 and Linus's tip the screen
corruption starts as soon as X starts (bar the mouse curser) and KDE
crashes during startup and then it cycles trying to start

With intel-next kernel however the corruption only starts when KWin
starts the compositing effects and KDE does fully start (this is with
and without the above patch) and with the patch I can boot with
i195.modeset=0 and everything looks fine

Regards

Mike