I too can confirm that on the same laptop. Also once i wake it up from sleep and enter my password the screen goes blank. I need to repress the power button and screen is back again. Should i install any drivers. I am facing quiet a few screen issues.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1208257 Title: [HP ProBook 4540s] brightness control problems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1208257/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
