Bug 70042

Summary:

Major texture flickering in Dota 2 (r600g on HD 6950)

Product:

DRI

Reporter:

Alexandre Demers <alexandre.f.demers>

Component:

DRM/Radeon

Assignee:

Default DRI bug account <dri-devel>

Status:

RESOLVED FIXED

QA Contact:

Severity:

normal

Priority:

medium

CC:

maraeo

Version:

XOrg git

Hardware:

All

OS:

All

See Also:

https://bugs.freedesktop.org/show_bug.cgi?id=68451

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
Visible corruption on mini-map	none
Many glitches in the middle of the screen	none

Description Alexandre Demers 2013-10-02 16:24:31 UTC

Using a HD 6950 on Arch Linux 64
Using git codes for drm, mesa and ddx.

The game suffers from a major texture flickering in Dota 2. It has been since the release of the game. I'll attach an API Trace later today and some screenshots. It could be related to bug 68451, but the flickering is a lot more important than the screenshots seem to indicate.

I could also test by disabling shaders's sb optimization.

Comment 1 Alexandre Demers 2013-10-03 01:11:44 UTC

We can cross off the board:
sb optimization

Comment 2 Alexandre Demers 2013-10-03 05:59:59 UTC

I can't seem to be able to launch dota 2 with apitrace. I can launch Steam, but Dota keeps crashing at launch. I'll add screenshots later.

Comment 3 Alexandre Demers 2013-10-03 06:14:49 UTC

Created attachment 87012 [details]
Visible corruption on mini-map

While the texture flickering is very fast, it appears as static on screenshots. On this one, textures flickering on the mini-map and a thin artifact on the left side of the screen (looks like a line, but it is most likely a triangle caused by the light coming from a tower)

Comment 4 Alexandre Demers 2013-10-03 06:16:46 UTC

Created attachment 87013 [details]
Many glitches in the middle of the screen

Here, some more visible glitches flickering at an impressive pace.

Comment 5 Alexandre Demers 2013-10-05 04:46:13 UTC

Here is a link to a video exhibiting the corruptions/glitches.
https://docs.google.com/file/d/0Bw_tZdWsNa4BN0ZmRy1DMnFKZWs/edit?usp=sharing

You'll notice glitches here and there, mostly triangles. On the minimap, on the player's face and on some elements (name or HP), it is really visible. Working on an api trace (I have a trace, working on trimming it down).

Comment 6 Alexandre Demers 2013-10-05 23:37:17 UTC

attachment 87165 [details] [review] seems to fix the flickering

Comment 7 Alexandre Demers 2013-10-05 23:38:42 UTC

Marek, should I continue with the API trace if the patch fixes the flickering?

Comment 8 Marek Olšák 2013-10-06 01:07:00 UTC

No, I'll commit the patch.

Comment 9 Alexandre Demers 2013-10-06 20:56:06 UTC

I don't know the impact on performance of attachment 87165 [details] [review]. Dota 2 was the only game I was experiencing this texture flickering. It would be interesting to understand what and why. Anyway, it fixes the issue, so closing this bug.

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.