Hi Indan, Please provide the usual details about your system (especially what gpu this is on). Also, screenshots of what typical corruptions look like can help a lot in tracking down such things.
I've created two quick patches to check a few theories, please test them (both patches independently and both together). Patches attached. Yours, Daniel On Sat, Feb 19, 2011 at 06:58:06AM +0100, Indan Zupancic wrote: > Hello, > > Since 2.6.38-rc I get screen corruption (mostly horizontal grabage stripes on > the right side of the screen). After a long time bisecting the offending > commit > ends up being: > > commit a00b10c360b35d6431a94cbf130a4e162870d661 > Author: Chris Wilson <chris at chris-wilson.co.uk> > Date: Fri Sep 24 21:15:47 2010 +0100 > > drm/i915: Only enforce fence limits inside the GTT. > > So long as we adhere to the fence registers rules for alignment and no > overlaps (including with unfenced accesses to linear memory) and account > for the tiled access in our size allocation, we do not have to allocate > the full fenced region for the object. This allows us to fight the bloat > tiling imposed on pre-i965 chipsets and frees up RAM for real use. [Inside > the GTT we still suffer the additional alignment constraints, so it > doesn't > magic allow us to render larger scenes without stalls -- we need the > expanded GTT and fence pipelining to overcome those...] > > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk> > > This commit caused other problems too, which Daniel tried to fix with commits: > > 5e78330126e23e00950 drm/i915: fix relaxed tiling for gen <= 3 && !g33 > 75e9e9158f38e5cb21e drm/i915: kill mappable/fenceable disdinction > 818f2a3cc34b0673dcc drm/i915: revert pageflip/mappable related abi breakage > > But those don't fix my screen corruption. > > Unfortunately, it's a big commit and it doesn't revert cleanly, and its size > makes it unclear what the source of the problem is. Daniel's commits don't > revert cleanly either, so reverting all of them didn't work. > > I'll start poking at it and see if I can find anything. > > Greetings, > > Indan > > -- Daniel Vetter Mail: daniel at ffwll.ch Mobile: +41 (0)79 365 57 48 -------------- next part -------------- A non-text attachment was scrubbed... Name: for-indan-1.patch Type: text/x-diff Size: 452 bytes Desc: not available URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20110219/5efd4cd8/attachment.patch> -------------- next part -------------- A non-text attachment was scrubbed... Name: for-indan-2.patch Type: text/x-diff Size: 430 bytes Desc: not available URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20110219/5efd4cd8/attachment-0001.patch>
