This isn't a bug in gnome-power-manager since it affects KDE as well. Actually, it looks like the kernel (?) ignores whatever is written to /sys/class/backlight/acpi_video0/brightness; I can set it to zero and still no change:
$ ls /sys/class/backlight/ acpi_video0 $ cat /sys/class/backlight/acpi_video0/max_brightness 20 $ cat /sys/class/backlight/acpi_video0/brightness 20 $ echo 0 | sudo tee /sys/class/backlight/acpi_video0/brightness 0 $ cat /sys/class/backlight/acpi_video0/brightness 0 ** Summary changed: - Screen brightness setting has no affect + Screen brightness setting has no affect on HP ProBook 6560b ** Package changed: gnome-power-manager (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in Ubuntu. https://bugs.launchpad.net/bugs/990326 Title: Screen brightness setting has no affect on HP ProBook 6560b To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/990326/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
