Just installed AMD Drivers and Ubuntu doesn’t boot, the following screen appear, here is the easiest way to solve it:

ubuntudriverserror

This usually can be because of incorrect drivers installed, or most because you have a Hybrid Videocard, which works like 2 Videocards, but actually there is on videocard + 1 more processor, which when computer needs it gets activated, or it can be manually activated, and you computer graphics work faster.

To solve this problem and to boot Ubuntu you will have to remove installed fglrx drivers, and revert xserver-xorg configuration:

1) Remove the fglrx and revert configuration

sudo sh /usr/share/ati/fglrx-uninstall.sh
sudo apt-get remove –purge xorg-driver-fglrx fglrx*
sudo apt-get install –reinstall libgl1-mesa-glx libgl1-mesa-dri
sudo dpkg-reconfigure xserver-xorg

Now your Ubuntu should Boot up

2) Install Drivers Manually

sudo apt-get install build-essential cdbs fakeroot dh-make debhelper debconf libstdc++6 dkms libqtgui4 wget execstack libelfg0 dh-modaliasesp
sudo apt-get install ia32-libs (only if on amd64 as I was)
sh ./ati-driver-installer-11-9-x86.x86_64.run (choose build deb packages)
sudo dpkg -i fglrx*.deb
sudo aticonfig –initial -f

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