I'm using 14.04 on an HP ProBook 6460b. I have the same issue.
It used to dim the laptop screen when the monitor is unplugged. Then plugging it in again and removing it brought the controls back. As of today, even plugging the screen multiple times is not bringing back the controls. I really think we need this fixed. Khalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1291371 Title: thinkpad screen dims after unplugging external display, and won't re- brighten without leaving X To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1291371/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
