I tried radeon.modeset=0, this works. The screen starts dimmed and i could boot through. The function key to reduce the dimming doesn't work, but this is another bug report.
Erni35 -- frozen screen when starting unplugged from power cord with ATI graphics https://bugs.launchpad.net/bugs/561994 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
