My /sys/class/backlight/ directory has no further items such as a
mbp_backlight subfolder:
$ sudo ls -aFl /sys/class/backlight/
total 0
drwxr-xr-x 2 root root 0 2011-04-23 02:21 ./
drwxr-xr-x 49 root root 0 2011-04-23 02:21 ../
$
I tested it and the hack doesn't work for me. I modified
/etc/X11/xorg.conf, rebooted, and the F1-F2 keys are still unresponsive:
$ cat /etc/X11/xorg.conf
Section "Screen"
Identifier "Default Screen"
DefaultDepth 24
EndSection
Section "Module"
Load "glx"
EndSection
Section "Device"
Identifier "Default Device"
Driver "nvidia"
Option "NoLogo" "True"
Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection
$
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https://bugs.launchpad.net/bugs/743352
Title:
LCD backlight doesn't respond to brightness control keys
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