I'm on Ubuntu 12.04.
Everything was fine until I did a fresh install of a proprietary driver for NVIDIA, using the "Additional drivers" utility. After having restarted my computer, I cannot access to my session as usual anymore.
Different things can happen:
startx gives me weird colored patterns on the screen and keeps frozen.I tried sudo dpkg-reconfigure nvidia-current to fix my problem, but it didn't work.
Could you help me please ?
Try removing your freshly installed Nvidia driver and go back to the open-source driver, Nouveau. Log in to the command line interface of Ubuntu, launch sudo apt-get install nouveau-firmware (just in case) then follow the instructions at https://askubuntu.com/a/12941/5592:
To reconfigure xorg.conf, type the following command:
sudo dpkg-reconfigure xserver-xorgGo following the screen steps, answering the wizard questions and you should able to restore or reconfigure to previous Nouveau state.
After that, if this solved your problem, you will probably have a very low resolution. So launch the "Displays" utility from the Dash home and adjust your resolution accordingly to fit your screen the best.
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