Bug 96398 - [radeonsi tessellation] Single-pixel rasterization issue (Shadow of Mordor)
Summary: [radeonsi tessellation] Single-pixel rasterization issue (Shadow of Mordor)
Status: RESOLVED FIXED
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/Gallium/radeonsi (show other bugs)
Version: git
Hardware: Other Linux (All)
: medium normal
Assignee: Default DRI bug account
QA Contact: Default DRI bug account
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-06-06 09:31 UTC by Jan Ziak (http://atom-symbol.net)
Modified: 2016-08-25 16:21 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:


Attachments
tessellation off (131.71 KB, image/jpeg)
2016-06-06 09:32 UTC, Jan Ziak (http://atom-symbol.net)
Details
tessellation on (141.38 KB, image/jpeg)
2016-06-06 09:32 UTC, Jan Ziak (http://atom-symbol.net)
Details
tessellation on (141.38 KB, image/jpeg)
2016-06-06 09:33 UTC, Jan Ziak (http://atom-symbol.net)
Details

Description Jan Ziak (http://atom-symbol.net) 2016-06-06 09:31:42 UTC
GPU: R9 390
Mesa 12.1.0-devel (git-be365f3)

Please see the screenshots attached to this issue.
Comment 1 Jan Ziak (http://atom-symbol.net) 2016-06-06 09:32:33 UTC
Created attachment 124352 [details]
tessellation off
Comment 2 Jan Ziak (http://atom-symbol.net) 2016-06-06 09:32:49 UTC
Created attachment 124353 [details]
tessellation on
Comment 3 Jan Ziak (http://atom-symbol.net) 2016-06-06 09:33:03 UTC
Created attachment 124354 [details]
tessellation on
Comment 4 Jan Ziak (http://atom-symbol.net) 2016-07-20 12:50:28 UTC
Steps to reproduce:

1. Select low graphics quality
2. Restart game
3. Enable tessellation in game settings
4. Restart game
5. Start the benchmark from game menu
6. The benchmark title screen is showing white flickering pixels on Talion's leather baldric

Mesa 12.1.0-devel (git-3c78d89) 2016-07-20
Comment 5 Nicolai Hähnle 2016-07-20 17:12:03 UTC
Can you produce an apitrace?
Comment 6 Jan Ziak (http://atom-symbol.net) 2016-07-20 17:15:53 UTC
(In reply to Nicolai Hähnle from comment #5)
> Can you produce an apitrace?

I will try tomorrow.
Comment 7 Jan Ziak (http://atom-symbol.net) 2016-07-21 16:00:55 UTC
(In reply to Nicolai Hähnle from comment #5)
> Can you produce an apitrace?

http://atom-symbol.net/f/2016-07-21/ShadowOfMordor.trace.xz

The issue should manifest itself in some frames at the end of the trace.
Comment 8 Nicolai Hähnle 2016-07-25 20:19:30 UTC
Thanks, I can reproduce this on Polaris. No idea what's causing yet, though it seems there are actually some piglit tests affected by tesselation bugs as well (notably, arb_shader_image_load_store-coherency).
Comment 9 Marek Olšák 2016-08-25 13:48:44 UTC
I can't reproduce this on Tonga and Polaris11. It seems to be fixed. Can you please confirm?
Comment 10 Jan Ziak (http://atom-symbol.net) 2016-08-25 14:03:17 UTC
(In reply to Marek Olšák from comment #9)
> I can't reproduce this on Tonga and Polaris11. It seems to be fixed. Can you
> please confirm?

I can't reproduce the issue as well. It was still there just a few weeks ago.

I will do a more thorough check later today and close this issue if the problem is no longer there.


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