A workaround I found is to disable "Dim display when idle" (under both AC and battery) in System > Preferences > Power Management.
-- Ubuntu 8.10 on Sony Vaio: lcd brightness misbehavior https://bugs.launchpad.net/bugs/293633 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs