Ok guys, thanks to all of you for your feedback. Before talking again about it, i did some tests in the last days. This is what I have found. mplayer output is smooth when loading a ULV profile with kernel-congif mplayer output is smooth when loading a LV profile with kernel-congif mplayer output stutters when I load a DSP profile with kernel-config mplayer output stutters without using power-config to load any profile, it's enough enabling smartreflex editing the pmconfig file As you know, I'm not an expert. I did 4 times the tests, every time reflashing the device, with installed only PK49 and the latest testing CSSU. I tried once without CSSU too, things gone in the same way, mplayer output stutters when there is smartreflex enabled. Can you guys try it too? If u have mplayer+kmplayer installed, it should take only few seconds of your time to load a dsp profile and start a video with mplayer d!