OpenSource ATI Graphics Slow After Upgrade Mesa 10.2 Kernel 3.14.6

HarlemSquirrel · 2014-06-08 21:02:22

I just upgraded today to mesa 10.2 and kernel 3.14.6. Steam launches and I can run Dota 2 and Left 4 Dead 2. However, when I start a game, the graphics are very choppy even though they were smooth with mesa 10.1. I have tried the suggestions posted on the link below that fixed this problem the last time I updated and got this issue, but it did not work this time.

https://bbs.archlinux.org/viewtopic.php?id=181171

Does anyone know how to view the steam log file?

64-bit Arch Linux
Cinnamon Desktop
Radeon R7 260X

Last edited by HarlemSquirrel (2014-06-08 21:12:58)

HarlemSquirrel · 2014-06-08 21:13:50

OK, so I downgrade the Linux kernel from 3.14.6 to 3.14.5 and everything is working well now! I don't know much beyond that. It seems like 3.14.6 has something wonky going on.

firefly · 2014-06-10 08:25:59

For what it's worth, I have the same problem after the upgrade to 3.14.6 with L4D2 and Portal2 - I have Intel graphics.
I've also noticed that it takes much longer for the game to load and the video is choppy regardless how low I put the settings.

64-bit Arch Linux,
Gnome desktop,
Intel i7 2.40GHz × 8

andrewd18 · 2014-06-10 18:27:49

Quite a few radeon changes were merged in the 3.14.6 patch window.

https://www.kernel.org/pub/linux/kernel … Log-3.14.6

I would bet you're seeing one of the two following changes, which modify some cards' ability to dynamically change power states:

commit c37a57cce4fe8affcf3f589232fd006be967f11c
Author: Alex Deucher <alexdeucher@gmail.com>
Date: Fri Apr 18 09:08:11 2014 -0400
drm/radeon: disable dpm on rv770 by default

commit 5fe20c529d02c53e1924e8e50f5601f9f276b1d9
Author: Alex Deucher <alexdeucher@gmail.com>
Date: Thu Apr 10 22:29:03 2014 -0400
drm/radeon: disable mclk dpm on R7 260X

Last edited by andrewd18 (2014-06-10 18:29:20)

HarlemSquirrel · 2014-06-11 00:49:09

andrewd18 wrote:

drm/radeon: disable mclk dpm on R7 260X

This would definitely explain my degraded performance with my R7 260X. But why turn this off!? I hope I don't have the same issue with 3.15!

andrewd18 · 2014-06-12 13:34:56

HarlemSquirrel wrote:

andrewd18 wrote:
drm/radeon: disable mclk dpm on R7 260X
This would definitely explain my degraded performance with my R7 260X. But why turn this off!? I hope I don't have the same issue with 3.15!

Quoting from the changelog I linked:

Setting higher mclks seems to cause stability issues
on some R7 260X boards. Disable it for now for stability
until we find a proper fix.

Judging by how long "proper fixes" took for DPM-related things on the 6xxx cards, I would bet you won't see this get changed back until 3.16 or 3.17. You might be able to force it on with radeon.dpm=1 in your kernel boot parameters.

HarlemSquirrel · 2014-06-13 03:57:43

I am not sure that I am following all this correctly but in this bug report it looks like a fix is targeted for the 3.15 kernel.
https://bugs.freedesktop.org/show_bug.cgi?id=75992

HarlemSquirrel · 2014-06-15 01:01:24

I am happy to report that things are working well so far with 3.15-1 since updating this afternoon via the testing repository!

Arch Linux

#1 2014-06-08 21:02:22

OpenSource ATI Graphics Slow After Upgrade Mesa 10.2 Kernel 3.14.6

#2 2014-06-08 21:13:50

Re: OpenSource ATI Graphics Slow After Upgrade Mesa 10.2 Kernel 3.14.6

#3 2014-06-10 08:25:59

Re: OpenSource ATI Graphics Slow After Upgrade Mesa 10.2 Kernel 3.14.6

#4 2014-06-10 18:27:49

Re: OpenSource ATI Graphics Slow After Upgrade Mesa 10.2 Kernel 3.14.6

#5 2014-06-11 00:49:09

Re: OpenSource ATI Graphics Slow After Upgrade Mesa 10.2 Kernel 3.14.6

#6 2014-06-12 13:34:56

Re: OpenSource ATI Graphics Slow After Upgrade Mesa 10.2 Kernel 3.14.6

#7 2014-06-13 03:57:43

Re: OpenSource ATI Graphics Slow After Upgrade Mesa 10.2 Kernel 3.14.6

#8 2014-06-15 01:01:24

Re: OpenSource ATI Graphics Slow After Upgrade Mesa 10.2 Kernel 3.14.6

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