Public bug reported: I first reported this as bug #214440, thinking it was gnome-power- manager related. It's not. The display automatically dims on boot when drivers are being loaded, before any Gnome stuff is introduced. Please see that bug for some log output.
https://bugs.launchpad.net/ubuntu/+source/gnome-power- manager/+bug/214440 I can control display brightness using the keyboard but the settings in Power Manager preferences, seem to be ignored. For example, when I unplug the AC power, the screen dims, but when I plug it back in again, the screen notifier shows the brightness increasing to about 90% (it is set to be 100% on AC power) but in fact the screen remains dimmed and does not actually increase. If I unplug the AC power again, the display brightness decreases and so on until after unplugging the AC power four times, the display brightness is at its lowest level and plugging in AC power makes no difference to the actual brightness. I can rectify this by using the FN-F11 keys. I'm running the latest Hardy updates on a Lenovo 3000 N100 Centrino Duo. I've attached some logs. This is not a recent problem but started occurring a few months ago. Thanks for any help solving this. ** Affects: xserver-xorg-video-intel (Ubuntu) Importance: Undecided Status: New -- Display brightness requires manual intervention https://bugs.launchpad.net/bugs/241867 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