I have a strange one for you here. I had lots of trouble from the very beginning with the backlight on my NB30. Now running ubuntu 10.04 and everything was working fine with samsung-backlight (and wireless -- also had some trouble with that previously) until the update last week. I now get a blank screen when coming back from suspend with the lid shut on battery power (and the keyboard seems inactive, not only the screen). On the other hand, if I suspend manually without shutting the lid then the computer wakes up normally. The strange thing is I don't have any problem on AC power, the computer wakes up normally anyway.
As I didn't have this problem before the last update, is it possible to recover the previous version of the backlight driver? I suspect this can be the problem. Or maybe you want to try and fix it in the next version?