Settings -> CyanogenMod settings -> Display -> Automatic backlight
At "Light levels" tag "Use custom".
Push "Edit other levels..."
Under the column of keyboard change the values to 255, 255, 255, 255, 0
Push the [Save & apply] button and then [Reload current] just above the columns.
Not sure if you need to reboot the phone, For me it worked instantly.
Only when you are in direct light the keyboard back-light is turned off
Still struggling with the HW Keyboard Layout of my girls X10 mini pro... Came across the following guide: http://forum.xda-dev...ad.php?t=953302
Edited by Asherdu, 07 January 2012 - 03:17 PM.