I experienced the same problem. The last working version of kernel was 3.5.0-21. Next version (3.5.0-22) started to give problems, there was a regression here. I have the same symptoms as described here, and I have exactly same hardware.
Problems occur again in 3.8.0-19. Installing proprietary drivers: only beta drivers work properly and I win the ability to adjust brightness of screen (don't available in opensource radeon driver), but often I don't get to login screen (boot sequence stop after kubuntu blue logo disappears), and when I get it, sometimes I have to go through an abnormal blue screen with vertical lines during some seconds until login screen appears. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1123024 Title: Screen flickering at login screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1123024/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
