Bug 99191

Summary:	Weird blocky green stuff rendered in High Fidelity
Product:	Mesa	Reporter:	Christoph Haag <haagch>
Component:	Drivers/Gallium/radeonsi	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:	Default DRI bug account <dri-devel>
Severity:	normal
Priority:	medium
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Christoph Haag 2016-12-23 11:06:28 UTC

RX 480, mesa git, llvm 4.0.0svn_r290385

They have an OpenGL 4.1 and an OpenGL 4.5 backend and it happens on both.

Here is a video with the 4.3 backend: https://www.youtube.com/watch?v=VpNFhlzsLHg

Here is a (50 megabyte compressed) trace with the 4.5 backend: https://haagch.frickel.club/files/interface.trace.xz

Possibly an application bug, but glretrace prints no real errors.

If you want to run it yourself, you will need this fix: https://github.com/highfidelity/hifi/pull/9264#issuecomment-268943917

Comment 1 Samuel Pitoiset 2017-01-05 19:39:01 UTC

This app looks like totally buggy.

Rendering is broken with NVIDIA blob and Nouveau on Maxwell, on SKL and radeonsi. :)

Comment 2 smoki 2017-01-06 04:25:14 UTC

  Yup, trace does not even run with AMD blob also... likely does not work anywhere.

Comment 3 Samuel Pitoiset 2017-01-06 08:03:34 UTC

I think the correct status should be NOTOURBUG but whatever.

Comment 4 Christoph Haag 2017-08-20 11:49:23 UTC

I've reopened, but feel free to close again if it still doesn't work on other drivers.

Now that it doesn't hang my GPU anymore I've spent a couple of hours tweaking the source code, available here: https://github.com/ChristophHaag/hifi/commits/master

The rendering is better now: The blocky stuff is not green anymore, but it did not disappear. New video showing the problem: https://www.youtube.com/watch?v=pda7cNx3ATE

And here is a new trace that runs with an actual 4.5 core context with no mesa GL errors anymore: https://haagch.frickel.club/files/interface-blockartifacts.trace.xz (512 mb uncompressed)

If you want to run this trace right now, you need the patch from bug 102308, currently on the list https://lists.freedesktop.org/archives/mesa-dev/2017-August/166827.html

Comment 5 Ilia Mirkin 2017-08-20 16:39:50 UTC

Tried it on nouveau, but I get a ton of

Mesa: User error: GL_INVALID_VALUE in glBindBufferRange(offset misaligned 704/256)

This is due to the alignment requirements for constant (and texture) buffers being higher on NVIDIA hw than AMD hw.

Comment 6 Christoph Haag 2017-09-22 23:28:34 UTC

It doesn't happen anymore on HiFi's RELEASE-7150 tag and radeonsi git, so either of them probably fixed it in the meantime.

I'm very happy to close this again.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.