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Old 09-01-2011, 05:18 AM   #1
edooze
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Registered: Jul 2006
Location: Brisbane, Australia.
Distribution: KUbuntu 11.04
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Screen tearing - KUbuntu 11.04 & Radeon 6950


Hi all.

Just finished a new build with a (Sapphire) Radeon 6950 1GB.

I'm having huge screen tearing issues both watching video and even moving windows around the desktop. So far, my old GeForce 8500GT coped better than the Radeon does!

I've installed the catalyst drivers, but I'm unable to turn on the tear-free option in the catalyst control center. No idea why, but every time I open the program it's set to 'disabled'. So I enable it and restartx. And it's disabled. So I enable it and restartx. You see where I'm going here?

Can anyone help, please?

Thanks,
edooze
 
Old 09-02-2011, 05:18 PM   #2
business_kid
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Post the output of

glxinfo |grep OpenGL
 
Old 09-03-2011, 08:42 AM   #3
edooze
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Registered: Jul 2006
Location: Brisbane, Australia.
Distribution: KUbuntu 11.04
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Thanks for jumping in here, business_kid!

glxinfo was not installed, but after installing it, here is the output:
--
X Error of failed request: BadRequest (invalid request code or no such operation)
Major opcode of failed request: 139 (ATIFGLEXTENSION)
Minor opcode of failed request: 66 ()
Serial number of failed request: 13
Current serial number in output stream: 13
--

Anything useful there?

Thanks,
edooze
 
Old 09-03-2011, 11:25 AM   #4
business_kid
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It indicates a driver problem. Just to see a good one, look at the output from my old box
Quote:
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: Mesa DRI R600 (RV730 9495) 20090101 x86/MMX+/3DNow!+/SSE TCL DRI2
OpenGL version string: 2.1 Mesa 7.9.2
OpenGL shading language version string: 1.20
OpenGL extensions:
The renderer string is coded stuff about the driver (I'm on OSS). Now yours should have different information, but not the middle finger like that appears to be raising.
Quote:
Major opcode of failed request: 139 (ATIFGLEXTENSION)
If you can delete and reinstall Mesa and Catalyst (Check your Catalyst version!) That would be one way to go. If you post on phoronix forums, the developers hang out there and they will presume a high level of knowledge on your part.

Did you install catalyst through the ubuntu system, or by downloading the .run file? If there is a catalyst driver for your board packaged by ubuntu, That's the way to go.

EDIT: That error appears to mean the module is not loading. grep for fglrx

lsmod |grep fglrx
grep fglrx /var/log/Xorg.0.log

Last edited by business_kid; 09-03-2011 at 11:29 AM. Reason: Copped on
 
1 members found this post helpful.
Old 09-10-2011, 03:27 AM   #5
edooze
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Location: Brisbane, Australia.
Distribution: KUbuntu 11.04
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business_kid - you are a legend.

For anyone else looking for a solution, installing the ubuntu driver rather than the ATI driver fixed the problem, and allowed me access to the control center.

I got the directions and some more explanations from here: http://wiki.cchtml.com/index.php/Ubu...river_Manually

Thank you, business_kid, thank you so much. Have a beer on me, my friend.

Cheers,
edooze.
 
  


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