[Bug 69340] Recent mesa git revisions cause frequent gpu hangs on radeonsi

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69340

--- Comment #11 from Dave Witbrodt <dawitbro at sbcglobal.net> ---
(In reply to comment #10)
> I have the gpu lockups too on an 7750 in different apps, for instance
> xonotic.
> I did a bisect and it led to this commit:
> 
> e8f9195e5fb34a45783d6491d2e0305a0b137439 is the first bad commit
> commit e8f9195e5fb34a45783d6491d2e0305a0b137439
> Author: Axel Davy <axel.davy at ens.fr>
> Date:   Thu Aug 15 12:47:58 2013 +0200
> 
>     gallium, intel: Implements new __DRI_IMAGE_USE_LINEAR and
> PIPE_BIND_LINEAR flags to enforce no tiling.
>     
>     Signed-off-by: Axel Davy <axel.davy at ens.fr>
> 
> And indeed reverting it seems to fix the lockups.

I can confirm that this commit was the problem in my case.  That commit
introduced a boolean error in src/gallium/drivers/radeonsi/r600_texture.c which
was later fixed in 49f2ba2c.

My Mesa build on Sep. 2 was before e8f9195e, and on Sep. 6 was after.  The new
Mesa I built today was only failing because my LLVM 3.4 did not include the
necessary patch for Marek's transform feedback work.  Once I update LLVM, no
GPU failures were observed and all was well again.

Hopefully José will have no more problems if he gets a new version of Mesa at
or after commit 49f2ba2c.  If he uses a version after 2b71b3d4, he will need
LLVM 3.4 at svn190575 or later.

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