I believe there are now two problems affecting this bug present in Intrepid:
1. The applesmc might not generate events via /sys/devices/platform/applesmc.768/light, which would be related to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/102270
2. The leds device name changed again, to /sys/class/leds:smc::kbd_backlight/brightness. A possible patch can be found here: http://launchpadlibrarian.net/17832556/fix-leds-filename.patch
I believe there are now two problems affecting this bug present in Intrepid:
1. The applesmc might not generate events via /sys/devices/ platform/ applesmc. 768/light, which would be related to https:/ /bugs.launchpad .net/ubuntu/ +source/ linux/+ bug/102270
2. The leds device name changed again, to /sys/class/ leds:smc: :kbd_backlight/ brightness. A possible patch can be found here: http:// launchpadlibrar ian.net/ 17832556/ fix-leds- filename. patch