This works for me on HP Compaq nc6400 (radeon mobility x1300) with a vanilla ubuntu 12.10 install:
1. edit grub command line to add 'nomodeset' and boot. 2. Then add 'nomodeset' in GRUB2's kernel command line (using GRUB_CMDLINE_LINUX in /etc/default/grub) and run 'sudo update-grub' 3. Add the following to /etc/rc.d/rc.local: modprobe -r radeon modprobe -r drm modprobe radeon modeset=1 4. Remove ~/.Xauthority 5. Reboot And the problem is solved. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1029790 Title: Can't boot without nomodeset option-kernel 3.5.X.X/3.6.X.X ATI M52 [Mobility Radeon X1300] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1029790/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
