AMDGPU Regression with Kernel 4.4-rc4

HarlemSquirrel · 2015-12-25 03:38:10

Dota 2 and Left 4 Dead two work well with only occassional system lockups when using kerenl 4.3 built using the linux-git package in the AUR. However, when I built 4.4-rc4, Dota 2 was unplayably slow. Left 4 Dead seemed to work OK. I didn't notice anything useful in the steam log or dmesg.

$ glxinfo | grep "OpenGL renderer string"
OpenGL renderer string: Gallium 0.4 on AMD FIJI (DRM 3.1.0, LLVM 3.7.0)

$ lspci -d ::0300 -nn
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Fiji XT [Radeon R9 FURY X] [1002:7300] (rev c8)

$ grep "model name" /proc/cpuinfo | head -1
model name    : AMD FX-8370 Eight-Core Processor

There's no improvement with rc5, rc6, or rc7.

Last edited by HarlemSquirrel (2016-01-01 01:58:34)

HarlemSquirrel · 2016-01-01 20:33:33

OK, I was finally able to bisect today and it looks like the culprit is...

a7ca8ef93001eaab4c5c7f4f3accfbe6ffcf5f26 is the first bad commit
commit a7ca8ef93001eaab4c5c7f4f3accfbe6ffcf5f26
Author: Flora Cui <Flora.Cui@amd.com>
Date:   Mon Nov 2 14:27:45 2015 +0800

    drm/amdgpu: update Fiji's Golden setting
    
    Change-Id: Ic3f3bfce4767cc05d04f6eb24e22a0f3e7ceacaa
    Signed-off-by: Flora Cui <Flora.Cui@amd.com>
    Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>

:040000 040000 0a2e67919fcc78b23e7ab7b9fa5978666aeab8cd 62f5595003bf498122fcbc5b65e3d7213a9d1e5a M	drivers

This commit can be found here: https://git.kernel.org/cgit/linux/kerne … e6ffcf5f26

Here is my bug report: https://bugzilla.kernel.org/show_bug.cgi?id=110211

Last edited by HarlemSquirrel (2016-01-02 00:26:38)

R00KIE · 2016-01-01 23:03:01

I'd say you want to report this upstream, here it will not get much visibility from the kernel developers.

HarlemSquirrel · 2016-01-02 00:27:17

R00KIE wrote:

I'd say you want to report this upstream, here it will not get much visibility from the kernel developers.

Yeah, I did report it. I just added the link to my bug to my second post. Thanks!

HarlemSquirrel · 2016-01-08 22:59:12

Well, it seems that things are much better with 4.4rc8! I'm not sure why. It could also be the new Mushkin RAM I installed. I was having a lot of other random issues with my G.Skill Ares kit like lots of build errors and random system freezes. I'll test this kernel out more this weekend.

Arch Linux

#1 2015-12-25 03:38:10

AMDGPU Regression with Kernel 4.4-rc4

#2 2016-01-01 20:33:33

Re: AMDGPU Regression with Kernel 4.4-rc4

#3 2016-01-01 23:03:01

Re: AMDGPU Regression with Kernel 4.4-rc4

#4 2016-01-02 00:27:17

Re: AMDGPU Regression with Kernel 4.4-rc4

#5 2016-01-08 22:59:12

Re: AMDGPU Regression with Kernel 4.4-rc4

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