[SOLVED] Kernel 4.0 with Radeon HD problem: Purple Line

rlees85 · 2015-04-29 19:53:22

Hi All,

This is my first post on the Arch forums! and probably going to get flamed a bit too as this is not an Arch specific problem. I am just hoping you guys will be able to help point me in to the right direction. The reason I am posting here on the Arch forums as it does affect Arch Linux now the kernel package has ticked over to 4.0.

The problem, is that after updating to Kernel 4.0, there is now a vertical purple line on the left hand side of my screen as soon as X is started - when using HDMI. I believe the problem lies in the Kernel, how would I go about reporting a potential kernel bug and what kind of logs (and how) would they expect me to provide?

My hardware (Radeon HD 6570):

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Turks PRO [Radeon HD 6570/7570/8550]

It works perfectly on 3.19 but 4.0 and 4.1-rc the purple line is present. In addition to the purple line, the display is not quite as crisp - slightly blurry.

I am using open source drivers - I have tried Mesa 10.5 and 10.6 (development) makes no difference.

Have tried on both Arch Linux and Linux Mint - again distro makes no difference.

Only happens when using HDMI out, VGA is fine.

Image: https://lh3.googleusercontent.com/-i_dX … 203014.jpg

Any help would be greatly appreciated

RESOLUTION: Bug Report @ kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=97561

WORKAROUND:

xrandr --output HDMI-0 --auto --set audio off

PS. I learnt a lot moving to Arch... great distro!!

Last edited by rlees85 (2015-04-30 21:11:10)

Forgotten Path · 2015-04-29 20:34:12

I'm also having video issues since updating to kernel 4.0.1. A lot of video tearing and "glitching". I have a Radeon card as well:

$ lspci | grep Radeon
05:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Venus XTX [Radeon HD 8890M / R9 M275X] (rev ff)

I'm going to try and downgrade my kernel to confirm if that's the cause. There weren't many other packages that upgraded, though...

**EDIT** The kernel is definitely the issue, or at least something conflicting with the kernel. I'm having bad luck. This is the second package upgrade in a week to make my system screwy (wpa_supplicant being the first).

Unfortunately, I'm not real sure myself on how to go about filing an effective bug report. Once more info on that is forthcoming, I'll re-upgrade my kernel and provide any relevant logs, etc. Or file a separate report if the issues aren't closely related. Thanks!

Last edited by Forgotten Path (2015-04-29 20:48:07)

rlees85 · 2015-04-29 21:06:49

Thanks for sharing... Although I think your issue might be different. The plot thickens a bit with mine now, it only does it when using HDMI out - VGA is fine! I am going to see if I can find anything in dmesg...

As your using a mobile chipset (I think? 8890M) I am guessing your not using HDMI.

bleach · 2015-04-29 21:20:12

im using a intel hd 4 gen and I get a wierd glich where it creates waves on the screen so I do not think this is card specific though I do not get the purple line.

Last edited by bleach (2015-04-29 21:22:22)

rlees85 · 2015-04-29 21:57:38

Issuing this command fixes my problem:

xrandr --output HDMI-0 --auto --set audio off

I guess this must be something caused by HDMI audio and disabling it fixes it.

Similar to: https://bugzilla.kernel.org/show_bug.cgi?id=43154 maybe?

So if anyone clever reads this, I just have two questions:

How to I formally report this effectively?

How do I set it so HDMI audio is disabled automatically at boot?

Thanks all!

Forgotten Path · 2015-04-29 21:57:53

As your using a mobile chipset (I think? 8890M) I am guessing your not using HDMI.

Yes, its a mobile chipset. I'm not using HDMI out. As a matter of fact, it has hybrid graphics, and should by default be rendering with the integrated Intel HD card, which brings me to:

im using a intel hd 4 gen and I get a wierd glich where it creates waves on the screen so I do not think this is card specific though I do not get the purple line.

This sounds like my issue, so maybe my problem is on the Intel HD side of things.

I would start a separate thread, but since we're seeking the same solution (learning more information on filing a bug report), I'll hold off on that.

rlees85 · 2015-04-30 21:08:30

Bug report made @ kernel.org: https://bugzilla.kernel.org/show_bug.cgi?id=97561

I am going to mark this as solved, anyone else with this problem please post on kernel.org using the link above.

Arch Linux

#1 2015-04-29 19:53:22

[SOLVED] Kernel 4.0 with Radeon HD problem: Purple Line

#2 2015-04-29 20:34:12

Re: [SOLVED] Kernel 4.0 with Radeon HD problem: Purple Line

#3 2015-04-29 21:06:49

Re: [SOLVED] Kernel 4.0 with Radeon HD problem: Purple Line

#4 2015-04-29 21:20:12

Re: [SOLVED] Kernel 4.0 with Radeon HD problem: Purple Line

#5 2015-04-29 21:57:38

Re: [SOLVED] Kernel 4.0 with Radeon HD problem: Purple Line

#6 2015-04-29 21:57:53

Re: [SOLVED] Kernel 4.0 with Radeon HD problem: Purple Line

#7 2015-04-30 21:08:30

Re: [SOLVED] Kernel 4.0 with Radeon HD problem: Purple Line

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