Screen "tearing" every time the taskbar is modified, why?

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Screen "tearing" every time the taskbar is modified, why?

Postby picklemaster246 on Mon Jul 23, 2012 8:49 pm

OS: Ubuntu 12.04 LTS
DE: latest cinnamon release
Graphics card: AMD Radeon HD 6520G

Basically, each time a notification or icon is added automatically to the taskbar, the screen flickers/glitches/tears. For example, each time I receive a message in Pidgin, the screen flickers when the little icon in the lower right appears (http://i.imgur.com/o3lub.png not visible, dunno why), and when I click on the icon to take me to the message, it flickers when the icon goes away. This also happens with the autohide taskbar feature.

In fact, this topic right here exactly describes what's happening to me: viewtopic.php?f=208&t=107476

After googling around, I read some posts on the Ubuntu forums about turning on "Tear Free" in the Catalyst Control Center, but that does nothing.

Any help is appreciated.
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Re: Screen "tearing" every time the taskbar is modified, why

Postby esteban1uy on Mon Jul 23, 2012 9:03 pm

Try this:

Execute the following command in a terminal:
Code: Select all
gksu gedit /etc/environment

At the opened file, append the following line:
Code: Select all
CLUTTER_PAINT=disable-clipped-redraws:disable-culling

Save and reboot.
Any changes?
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Re: Screen "tearing" every time the taskbar is modified, why

Postby picklemaster246 on Mon Jul 23, 2012 9:57 pm

No, unfortunately there's still a glitchy mess when the taskbar is modified.
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Re: Screen "tearing" every time the taskbar is modified, why

Postby picklemaster246 on Tue Jul 24, 2012 10:54 am

I forgot to mention this: the reason I'm not using the open-source driver is because I can't get past a black screen at boot without using nomodeset, so I installed the proprietary ATI driver to keep from having to edit the launch option every time I boot.
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Re: Screen "tearing" every time the taskbar is modified, why

Postby kolslorr on Wed Nov 21, 2012 9:08 pm

Exactly the same problem.
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