Same problems happens for me with Mobile Intel® GM45 Express Chipset. There is no need to restart though. Logging out brings the full brightness back. But this is very annoying for the workflow as one can guess.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1307877 Title: Laptop Monitor Brightness reduced to minimum and disabled after disconnection from external monitor. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1307877/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
