I can confirm also it isn't working on a MacBook Pro 1,1. Tested with Lucid Beta 2 and all updates applied through 4/12/2010
eric@evil-twin:~$ sudo ls -al /sys/class/backlight/ total 0 drwxr-xr-x 2 root root 0 2010-04-13 14:30 . drwxr-xr-x 50 root root 0 2010-04-13 14:30 .. eric@evil-twin:~$ uname -a Linux evil-twin 2.6.32-20-generic #30-Ubuntu SMP Mon Apr 12 15:19:41 UTC 2010 i686 GNU/Linux
I can confirm also it isn't working on a MacBook Pro 1,1. Tested with Lucid Beta 2 and all updates applied through 4/12/2010
eric@evil-twin:~$ sudo ls -al /sys/class/ backlight/
total 0
drwxr-xr-x 2 root root 0 2010-04-13 14:30 .
drwxr-xr-x 50 root root 0 2010-04-13 14:30 ..
eric@evil-twin:~$ uname -a
Linux evil-twin 2.6.32-20-generic #30-Ubuntu SMP Mon Apr 12 15:19:41 UTC 2010 i686 GNU/Linux