luca, thank you for reporting this and helping make Ubuntu better. This is reproducible on disparate hardware in Trusty, so this would appear a general issue.
This may be intentional, so for now I'm going to mark this as a Wishlist. I'm not terribly sure the underlying part responsible so I'll leave this to the Ubuntu X team to comment more to this one way or another. Thank you for your understanding. ** Changed in: xorg (Ubuntu) Importance: Undecided => Wishlist ** Changed in: xorg (Ubuntu) Status: Confirmed => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1099115 Title: Can't change brightness while screen is locked To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1099115/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs