How do I enable the backlit keyboard on an ASUS G53SX or G53SW?

Does anyone know how to enable backlit keyboard on ASUS G53SX?

Edit as of Feb 18, 2012: As Qw4z1 mentioned here's a trick to enable the backlit brightness:

su
(enter root password)
echo 0x00050021 > /sys/kernel/debug/asus-nb-wmi/dev_id
echo 0x82 > /sys/kernel/debug/asus-nb-wmi/ctrl_param
cat /sys/kernel/debug/asus-nb-wmi/devs
exit

2 Answers

Try function F4 to turn the brightness up on the keypad.

This does it for me:

echo 0x00050021 > /sys/kernel/debug/asus-nb-wmi/dev_id
echo 0x82 > /sys/kernel/debug/asus-nb-wmi/ctrl_param
cat /sys/kernel/debug/asus-nb-wmi/devs

Can't seem to find a better solution for G53SX. Doesn't seem to work after a reboot though, so maybe run att startup or keep it in a file that you can run when it's dark. =)

Found it here: Notebookreview