Bug 102797

Summary:	Running unigine superposition benchmark in wine freezes the system
Product:	Mesa	Reporter:	Fabian Maurer <dark.shadow4>
Component:	Drivers/Gallium/radeonsi	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED DUPLICATE	QA Contact:	Default DRI bug account <dri-devel>
Severity:	normal
Priority:	medium
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Fabian Maurer 2017-09-15 17:18:53 UTC

Apitrace: http://www.mediafire.com/file/pc7yynmrmj9e6m2/unigine-freeze.7z
Running the trace with freeze the system, forcing a hard-reset.

System the bug was tested on:
- Arch Linux 64bit
- Linux 4.13.2, AMDGPU driver
- Mesa 17.3.0-devel (git-2f6ffab1ce) / 17.1.8
- Radeon R9 285

Comment 1 Samuel Pitoiset 2017-09-20 09:12:00 UTC

Very interesting stuff! It's similar to the TW3 issue (https://bugs.freedesktop.org/show_bug.cgi?id=101731).

Basically, Wine doesn't correctly set the transform feedback varyings (ie. count is 0 in glTransformFeedbackVaryings), then MEsa

Comment 2 Samuel Pitoiset 2017-09-20 09:13:32 UTC

[..] then Mesa reports the following errors:

Mesa: User error: GL_INVALID_OPERATION in glBeginTransformFeedback(no varyings to record)
358502: message: major api error 4: GL_INVALID_OPERATION in glBeginTransformFeedback(no varyings to record)

and the GPU hangs.

If you try the "special varying hack" patch from #101731 it fixes the issue.

*** This bug has been marked as a duplicate of bug 101731 ***

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