I entered as root and used startx and here I provide the error log. It seems that there is a problem with reading the VBIOS.
$ sudo apt-cache policy fglrx fglrx: Installed: 2:8.960-0ubuntu1.1 Candidate: 2:8.960-0ubuntu1.1 Version table: *** 2:8.960-0ubuntu1.1 0 500 http://es.archive.ubuntu.com/ubuntu/ precise-updates/restricted amd64 Packages 100 /var/lib/dpkg/status 2:8.960-0ubuntu1 0 500 http://es.archive.ubuntu.com/ubuntu/ precise/restricted amd64 Packages -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to fglrx-installer in Ubuntu. https://bugs.launchpad.net/bugs/1093788 Title: X doesn't load after fglrx install To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1093788/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp