Comment 27 for bug 1000146

@AceLan, there was no apparent change after adding the file and rebooting :

XXX@XXX:~$ uname -a
Linux studioB-1001HA 3.2.0-29-generic #46 SMP Wed Aug 1 05:44:53 UTC 2012 i686 i686 i386 GNU/Linux
XXX@XXX:~$ cat /proc/cmdline
BOOT_IMAGE=/@/boot/vmlinuz-3.2.0-29-generic root=UUID=XXX ro rootflags=subvol=@
XXX@XXX:~$ cat /etc/modprobe.d/asus-wmi.conf
install video modprobe asus-wmi; modprobe --ignore-install video;

XXX@XXX:~$ ls -l /sys/class/backlight/
total 0
lrwxrwxrwx 1 root root 0 Aug 8 15:44 acpi_video0 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0
lrwxrwxrwx 1 root root 0 Aug 8 15:46 eeepc-wmi -> ../../devices/platform/eeepc-wmi/backlight/eeepc-wmi
lrwxrwxrwx 1 root root 0 Aug 8 15:46 intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight
XXX@XXX:~$ sudo showkey
...
keycode 431 press
keycode 431 release

XXX@XXX:~$