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I'm using ubuntu 11.10 + gnome 3. Before I installed proprietary driver for my discrete card, Everything had worked fine (System indicator, Activities corner, dash,...). After installing the driver, the interface corrupted. Everything's gone except for a bar which contain: File, Edit, View, Help,.... and the desktop, I cannot use Alt+F2 nor windows button

Even when I uninstalled the driver, nothing's changed :'( I doubt that the proprietary driver hasn't been entirely removed or the system cannot switch to the old Integrated card. How can I get things back?

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Sounds to me like your window decorator is hosed. compiz --replace ccp & is where I would start looking – RobotHumans Nov 2 '11 at 14:01
@aking1012 Nope, Window decorator is fine. What I means is the taskbar and the system indicator bar has gone – Hieu M. Nguyen Nov 3 '11 at 9:06

I had the same problem with proprietary driver from AMD. Leave the proprietary driver installed and try to delete the .compiz-1 folder in your home directory and login again. If you do that with Nautilus, please check that you can see hidden files and folders in folder view.

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i have no idea if it's right, but it sounds totally reasonable – RobotHumans Nov 3 '11 at 16:50

You need to completely uninstall the driver and re-install it again

There is a very detailed answer on this Ubuntu Forums post that should help you solve the problem.

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