Arch Linux

Shino

Member

From: Germany

Registered: 2015-02-01

Posts: 109

xf86-video-ati. Gnome and Radeon HD6850 weird bug

Hi,

I have a Radeon HD 6850 graphics Card with two monitors. I have a strange bug when I'm booting my system.

Bug 1:

The moment GDM loads, I have graphic errors on my screen. But it is not just an error. My screen shows my desktop right before shutdown on some places on the screen. After half a second or so the graphic errors disappear and GDM shows.

Bug 2: actually, it's the same bug

I log in. Now my whole monitor shows my Desktop, as it was before shutdown (there are small graphic errors. I will explain those later). After 1 second the gnome wallpaper loads and the system works normal.

Bug 3:

The Volume change overlay of gnome shows on both of my monitors. Compared to the other issues it's not that much of a problem but I think this also shouldn't be.

My ideas:

The longer I wait between shutdown and boot, the more those graphic parts on the screen vanish to random colored areas. I think there's still an image of my desktop in the graphics memory and the card shows it after reboot. the image vanishes because the Data in the Graphics memory vanishes (dynamic memory).

This Bug is just very annoying. Is there a chance to fix this problem?

II can't use the system like this. It's unacceptable that the monitor shows the desktop right before powering of the PC.

I hope someone has an idea because I'm just clueless how such things are even possible. Something like this  must not happen!

Thank you in advance

I will take some pictures and include them in my next post.

frank604

Member

From: BC, Canada

Registered: 2011-04-20

Posts: 1,219

Re: xf86-video-ati. Gnome and Radeon HD6850 weird bug

There is no information provided here about your system.  Perhaps some configs or logs? Have you read through the configuration part on the wiki? https://wiki.archlinux.org/index.php/AM … the_driver  perhaps that would shed some light?

Shino

Member

From: Germany

Registered: 2015-02-01

Posts: 109

Re: xf86-video-ati. Gnome and Radeon HD6850 weird bug

Hi. I'm using the opensource driver. Not the proprietary one (That doesn't work with gdm).

Xorg and gdm etc. don't create any log file.
I couldn't find Logs in /var/log

http://bugs.arch.linux.kthx.at/

Here you can see three images. first one is the Webbrowser in gnome.
Then I shut down the system. And started it again. When GDM starts I see picture number 2.
After login in, right before the gnome desktoip appears, I see Picture number 3

I have no words for this...

Maybe I switch back to Ubuntu.
There are just too many problems with the graphics. Most things work perfect....But the graphics. No comment. I had even problems with integrated Intel cards (Intel HD 4600)

frank604

Member

From: BC, Canada

Registered: 2011-04-20

Posts: 1,219

Re: xf86-video-ati. Gnome and Radeon HD6850 weird bug

Did you read wiki?  Just wondering as that was the main point.  But then again I don't know enough about ati cards and maybe someone can chime in.  But until then I'm curious if you went through the wiki I linked earlier.
No harm in going to ubuntu if that works for you.

Last edited by frank604 (2015-02-07 19:51:47)

Shino

Member

From: Germany

Registered: 2015-02-01

Posts: 109

Re: xf86-video-ati. Gnome and Radeon HD6850 weird bug

Yeah. I read the wiki. But I was'nt able to get the proprietary driver working. light dm shpuld work but I think I'll install ubuntu. The proprietary driver is not that good. Sure its performance in Games is better. But with Videos and such things I have better experience with the opensource driver.

burafino

Member

From: London

Registered: 2009-12-07

Posts: 19

Website

Re: xf86-video-ati. Gnome and Radeon HD6850 weird bug

I only had weird graphics appear after GDM before gnome-shell start.
I got rid of those by modifying my /etc/X11/xorg.conf.d/20-radeon.conf to make sure EXAPixmaps was set to off. I also changed my AccelMethod to Glamor.
Here's my complete 20-radeon.conf

Section "Device"
    Identifier "Radeon HD 6370M"
    Driver "radeon"
    Option "SWcursor" "off"
    Option "AccelMethod" "Glamor"
    Option "RenderAccel" "on"
    Option "ColorTiling" "on"
    Option "EXAVSync" "off"
    Option "EXAPixmaps" "off"
    Option "AccelDFS" "on"
EndSection

Hope this helps.