Comment 24 for bug 1000146

Gary, thanks very much.
The asus-wmi driver maintainer did some modification on my patch
and we didn't imagine that will lead to the problem you have.

I totally know the situation and will try to figure out a feasible solution for it.

The problem is that in your system, there are eeepc-wmi and acpi_video0 directories in the /sys/class/backlight
and while pressing the hotkey, the gnome-settings-daemon will try to turn on/off the screen through /sys/class/backlight.
And in the gnome-settings-daemon, the one it chose to operate is acpi_video0 which is not working.