I found it to be related to gnome-power-manager in my case. It sets the brightness to the gnome-power-manager settings even with the "Dim display when idle" check-boxes unchecked. When I use hotkeys (Fn + Up/Down) to set the brightness, it only stays for a few minutes, then it returns to gnome-power-manager settings. Hotkeys doesn't set the gnome- power-manager brightness.
-- Screen brightness switches from bright to moderate randomly. Ubuntu 7.10 https://bugs.launchpad.net/bugs/153385 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs