Comment 0 for bug 1203592

In Ubuntu 13.04, the keyboard backlight does not work in Samsung Series 9 NP900X4C.

Adding the FN key mappings as described in https://help.ubuntu.com/community/SamsungSeries9 does show information in the notification area when pressing the keyboard backlight's + and - buttons, but:

1) The notification always identifies the backlight as "full max"
2) It has no effect on the backlight - it's always off

When I first installed Ubuntu on this machine (12.10), even though the fn keys never worked I did have intermitent backlight functionality - the light sensor would sometimes work and I'd see light in the keyboard.

I dual boot in Windows 8 and backlighting works there, so this is not a hardware issue.