tested with kernel night build 3.11-rc7, still have the same problem with internal LCD. ( no issue at all with any kernel for external connected LCD via vga port)
machine: dell inspiron 1501, onboard video card ATI Xpress 200m (RS460). workaround: follow the lightdm_delay script provided by Id2ndR (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1029790/comments/60) and added radeontool lightoff and on around kms loading radeontool light off modprobe radeon modeset=1 sleep 2 radeontool light on -- 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: 1002:714a 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