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-X, which is subscribed to xorg in 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 _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp