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I'm new to linux, I've installed ubuntu 12.10 and install Nvidia driver for 8500 GT. After the restart unity disappear, all what I see is the desktop, no top menu no dash. I've tried to install all available drivers, but I get the same issu. So what should I do?

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Hey I had the same problem after I switched to the official Nvidia proprietary drivers but when I installed the latest generic linux headers everything went back to normal. Try this and restart

sudo apt-get install linux-headers-generic linux-image-generic

Hope this helped.

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  • Actually I installed the third driver then the whole graphic system disappear, what i got only command line. I tried to install gnome, but can't log in to graphical mode, so I installed a fresh version of ubuntu, even now i can't understand what wrong I made :) – user107353 Nov 12 '12 at 23:30
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First step, right click on your desktop then select 'open terminal' If you haven't installed unity-tweak before you should install it first.

$ sudo apt-get install unity-tweak-tool  
$ unity-tweak-tool --reset-unity
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  • I don't think there is reason to reset Unity! In my experience this particular problem occurs because the driver is not properly installed/loaded. Your suggestion will reset all Unity settings to their defaults, which is probably not what OP desires. – Nephente Sep 25 '15 at 7:09
  • It's OK on ubuntu 15.04 after I installed nvidia driver 346.59 and then reboot computer. My ubuntu showed desktop only, don't have unity. I reset by uninstall nvidia driver to intel driver but now unity remain disappeared. I search and found something then test it with that command. Oh! My unity comes here. It's appeared again. I posted it when I found the right way to fix that issue. I learned something on Stackoverflow.com which you should test before post something. Don't think and post or search on web then post it. – GMzo Sep 26 '15 at 15:46
  • About that you comment, My Unity doesn't go to default. It comes with my all setting my icons and my theme. – GMzo Sep 26 '15 at 15:50
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As far as I understand, you will need to recompile the kernel as well if you wish to use the graphics card to the fullest capacity. Go to nvidia website and download ur driver file.

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  • That is not true.The proprietary GPU drivers are not compiled into the kernel but made available through modules on runtime, usually through DKMS. The nVidia driver installation program will build a DKMS model and insert it into the DKMS tree. – Nephente Sep 25 '15 at 7:07

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