Comment 61 for bug 568611

@Kamal: I definitely need both commands. When I use both, everything works. When I use only the first one, the following things happen: a) the fan goes crazy (this also happened with your old kernel after awaking from suspend, so a restart is needed to turn it off) b) the screen is very dark (in contrary to 100% as before) and the controls don't work, neither the fn keys nor the power managment brightness slider. c) however, only one backlight control (your new one) appears

Hope you can read something from that, especially why the fan goes high, I will try suspend tomorrow, but I guess this is some other matter...