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View Full Version : [ubuntu] 11.04 upgrade -> choppy desktop graphics with ATI?


ljp37
April 29th, 2011, 07:45 PM
Just upgraded from 10.10 to 11.04.

Under 10.10, moving windows, scrolling, and compiz's expo were smooth as silk with my Radeon HD 5450 using the fglrx driver.

After the upgrade, these things are very choppy, to the point that it feels like I'm running without hardware acceleration. The weird thing is, the system tells me I have acceleration --- Compiz is still running and I'm able to use expo and other effects, glxinfo reports direct rendering, and the Additional Drivers control panel tells me I'm still using fglrx (I even tried re-installing it, to no avail). OpenGL screensavers work fine, and glxgears gives me 1550 fps. Could it be that compiz is somehow not using hardware acceleration, even though my driver offers it? This happens in both Unity and Classic desktop.


I'd really appreciate any help on trying to fix this.
sikander3786
April 29th, 2011, 07:54 PM
Please take a look here and let us know if it works.

http://ubuntu4beginners.blogspot.com/2011/04/unity-choppy-with-ati-graphics-card-and.html
ljp37
April 29th, 2011, 08:20 PM
Please take a look here and let us know if it works.

http://ubuntu4beginners.blogspot.com/2011/04/unity-choppy-with-ati-graphics-card-and.html

Brilliant, thanks! That immediately fixes expo and scrolling.

It improves window moving, but that still looks choppy (i.e., I can see "half windows" during the redraw, like it's not getting double buffered)
sikander3786
April 29th, 2011, 08:34 PM
Which version of proprietary drivers is installed there? Search for Additional Drivers after pressing the <Super> (Window logo) button.

Also, please post the output of this command.


cat /etc/X11/xorg.conf
ljp37
April 29th, 2011, 10:48 PM
Which version of proprietary drivers is installed there? Search for Additional Drivers after pressing the <Super> (Window logo) button.

Also, please post the output of this command.


cat /etc/X11/xorg.conf



Section "Screen"
Identifier "Default Screen"
DefaultDepth 24
EndSection

Section "Module"
Load "glx"
EndSection


Catalyst gives the 2D Driver Version as 8.84.60


The window moving thing isn't really a big deal. After fixing the compiz opengl settings and using it for a few hours, I find myself wondering if it really was any faster in 10.10.
FormerSlacker
April 29th, 2011, 11:46 PM
This did the trick for me.

http://ubuntu4beginners.blogspot.com/2011/04/unity-choppy-with-ati-graphics-card-and.html
tep200377
July 7th, 2011, 11:19 AM
Thanks, the Sync to VBlank did miracles for me ;)
drrbradford
August 22nd, 2011, 03:10 PM
Thanks for the link to that solution. Solved my problems. Windows aren't choppy when dragging either. I'm on 64 bit with ATI Radeon HD 4550.
ujodarko
November 5th, 2011, 04:54 PM
I have choose Metacity as Window manager and there was no choppy movements.
... so, maybe Compiz iz faulty, not ATI CCenter?!