hm..tks guys..kind of difficult to chose..what do you mean by unstable?..my n900 is running now 4hours in standby with dsp and only 2% battery consumption..i am happy...besides..its just boring if u wanna make a hd video to have to open xterm and change kernel profile...so if its always in dsp its pretty confortable..what do you think?...do this other profiles save even more battery, is that it? ...how often do you guys run optimizen900?