I was just screwing around with this and found out something interesting. In /etc/modprobe.d/samsung-backlight.conf you'll likely see;
blacklist samsung-laptop options samsung-backlight use_sabi=0 levels=8 force=1 Remove the blacklist and keyboard backlight controls will work and org.freedesktop.UPower.KbdBacklight exists allowing you to control the keyboard brightness. But the screen backlight stops working... Add the blacklist back, screen brightness works again, keyboard brightness does not, and org.freedesktop.UPower.KbdBacklight does not exist. I don't really have any more time to play around but thought I would share. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1203592 Title: Keyboard backlight does not work in Samsung Series 9 NP900X4C Status in “gnome-settings-daemon” package in Ubuntu: Confirmed Bug description: 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. More discussion can be found here: http://askubuntu.com/questions/233312/how-to-make-keyboard-backlight- fn-buttons-work-in-samsung-series-9 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1203592/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
