Can't you get a terminal with Ctrl+Alt+f1?
If you can
Code:sudo apt-get install --reinstall libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-coreand finally:Code:sudo apt-get install --reinstall libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core
should get you up and running. Provided ofcourse that libglapi did install correct since that was the problem.Code:sudo apt-get install xserver-xorg-video-ati
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