[Bug 71391] GM45: Regression due to incorrect graphics base of stolen memory.

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=71391

--- Comment #19 from Pär Lindfors <paran at lysator.liu.se> ---
(In reply to Chris Wilson from comment #16)
> Yes. What we will be looking for here is whether there is any pattern to the
> corruption. For example, if it is regular, it may be a scanout access
> violation. If it is located to one area, we may only conflict over a few
> pages (and we need to reserve a fraction of the stolen area for whomever).
> Or it may be dirty cachelines, in which case we have angered the GPU gods.

I shot a video. Not the best video quality, but it shows the bug
clearly. The file is 8.7M which is too large for bugzilla, so it is
available here:

http://www.lysator.liu.se/~paran/kernel/bugzilla/71391/71391-video1-720p.mkv

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