Bug 82253

Summary:	JanusVR Browser rendering misses floors on radeonsi, works on intel
Product:	Mesa	Reporter:	Christoph Haag <haagch>
Component:	Mesa core	Assignee:	mesa-dev
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	floors missing on radeonsi correct rendering on intel

Description Christoph Haag 2014-08-06 15:01:49 UTC

Application download is here: http://janusvr.com/

I made a short apitrace (26 megabyte): http://haagch.frickel.club/janusvr.trace

On intel Ivy Bridge it renders fine.
On radeonsi the floor is missing.

Using mesa git master with this patch: https://bugs.freedesktop.org/show_bug.cgi?id=80880#c10 on a HD 7970M.

Comment 1 Aaron B 2014-08-06 23:02:20 UTC

What sort of problems does this cause? So is it only when using hardware accel?

Comment 2 Christoph Haag 2014-08-06 23:12:38 UTC

Created attachment 104183 [details]
floors missing on radeonsi

It seems to be a purely visual problem in the rendering. Here is a screenshot with radeonsi.

I don't quite know what you mean with hardware accel. I just tried with LIBGL_ALWAYS_SOFTWARE=1 janusvr, so llvmpipe. With llvmpipe the floors are also missing like on radeonsi.
Maybe this was misplaced in the radeonsi component and happens in all llvm using or on all gallium drivers?

Maybe the llvm version is relevant: 3.6svn 214915

Someone told me the shaders are a bit wonky and partly shouldn't work in the first place, but on all proprietary drivers + intel on linux it seems to work, so I don't know.

Comment 3 Christoph Haag 2014-08-06 23:13:14 UTC

Created attachment 104184 [details]
correct rendering on intel

Comment 4 Michel Dänzer 2014-08-07 06:11:16 UTC

Could be an issue in st/mesa or other driver-independent Gallium code then.

Does glretrace also report a few OpenGL API errors like these on intel?

5946: message: major api error 1: GL_INVALID_OPERATION in Inside glBegin/glEnd
5947 @0 glTranslatef(x = 2.000085, y = 0, z = 0)
5947: warning: glGetError(glTranslatef) = GL_INVALID_OPERATION

Comment 5 Christoph Haag 2014-08-07 07:50:26 UTC

(In reply to comment #4)
> Could be an issue in st/mesa or other driver-independent Gallium code then.
> 
> Does glretrace also report a few OpenGL API errors like these on intel?
> 
> 5946: message: major api error 1: GL_INVALID_OPERATION in Inside
> glBegin/glEnd
> 5947 @0 glTranslatef(x = 2.000085, y = 0, z = 0)
> 5947: warning: glGetError(glTranslatef) = GL_INVALID_OPERATION

Yes, it produces exactly the same error log with intel, radeonsi and llvmpipe.

Comment 6 Christoph Haag 2014-12-23 00:05:04 UTC

JanusVR had lots of updates by now.

Whether it was a fix in janusvr or the driver - it works now.

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