Hello,
I Fixed the keyboard backlight FN keys. I had to add this patch to my DSDT: https://osxlatitude.com/forums/topic/5966-details-about-the-smart-touchpad-driver-features/?page=2&tab=comments#comment-32299
and change "LPCB" to "SBRG". After that I add the "FnKeys as Function Keys Patch.txt" to my DSDT. At the moment the following FN + F keys work:
F1 = not working
F2 = not working
F3 = backlight down, work
F4 = backlight up, work
F5 = brightness down, not working
F6 = brightness up, not working
F7 = Screen Backlight On/Off, not working
F8 = Video Mirror, not working
F9 = Touchpad, not working
F10 = mute, work
F11 = volume down, workDSDT.zip
F12 = volume up, work
Can someone help me to get the other FN + F keys working? For now the most important is the brightness up and down. Tried to add the "Fn Brightness Keys Patch.txt" to my DSDT but with no luck.