@ Darkus Kp49 with CSSU, smartreflex and DSP enabled via pmconfig. No stuttering playing a vid through KMplayer for me. Others can correct me if I'm wrong as I'm no expert either but the way I understand it, each phone is going to respond slightly differently to the kernel, so what may work best for mine, won't work best for yours. I use my phone as an mp3 player via mediaplayer for a few hours on the road each day and notice that my battery life is better in that scenario w/o KP49 booted up. My view is if one stutters and the other doesn't, stick with the one that works :-)