Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

After changing my graphic driver to one of the options shown as proprietary, I lost unity (wallpaper shows, terminal can be opened with ctrl+t, but nothing else displays).

My notebook: Dell Vostro 3560, Intel® Core™ i7-3612QM, AMD Radeon HD 7670M, 1 GB VRAM

What I already did is:

For the last one: "fglrx-installer" as mentioned in the link was not found.

The Error:

When I go to terminal (ctrl+alt+F1) and run the command unity, I get some hundred error lines reading like

Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0

If it helps:

lspci| grep VGA


VGA compatible controller: Intel Corporation 3rd Gen Core Processor Graphics Controller (rev 09)
VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Thamas XT [Radeon HD 7670M]

The question:

How can I revert my change to a proprietary graphic driver without beeing able to open the drivers window I made the changes in?

Thank you!


I followed the proposed procedure, unfortunately I had no success, as there where multiple errors. Eventually someone is able to interpret them.

1)/etc/X11/xorgs.conf does not exist.

2)unitx-reset gives 50+ errors "dconf-WARNING **: failed to commit changed to dconf: Error spawning command line 'dbus launch --autolaunch..."

3) installing fglrx from launchpad failed for dozens of unresolveable dependencies.

4) sudo apt-get install fglrx

How can I get rid of all manually installed drivers and use the pre-installed ones that where shipped on the cd? Thanks!

share|improve this question

Ok what I would do is:

Bring up a terminal window by pressing ctrl+alt+t or by going to crtl+alt+F2 and logging in to a text console there. (press ctrl+alt+F7 to get back to the gui console)

sudo apt-get install ppa-purge sudo ppa-purge xorg-edgers

sudo apt-get purge fglrx* sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf.backup sudo apt-get update sudo apt-get dist-upgrade sudo reboot

See if things are looking better...

If not, get to a terminal again; wget

sudo dpkg -i unity-reset_0.1-8_all.deb (or copy it from another computer to a usb stick and install it from there)

Then go into the gui console (CTRL+ALT+F7) Get a terminal window (CTRL+ALT+T) or otherwise try using ALT+F2, and type: unity-reset Wait for a couple of minutes while the script does its' thing. Hopefully Unity will be recovered.

Then go here and download the latest fglrx package: and download your preferred fglrx package (I would avoid the beta one).

Then install it, restart and see if everything works. If not, try running unity-reset again, and hopefully that will fix it. If the driver still messes things up, you could alternatively uninstall it and use the open source one, or try one of the fglrx drivers that are in the Ubuntu ppa. (sudo apt-get install fglrx) or (sudo apt-get install fglrx-updates)

share|improve this answer
Hello, thank you! (+1) I followed the procedure and updated my question with the results. – Zsolt Szilagy May 30 '13 at 3:26

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.