hi i have a shuttle XS35GTV2 with Intel D525 Atom CPU and Ion2 GPU (8 cores, vbios 70.18.64.00.0e).
i installed ubuntu 11.10 and then xubuntu (xfce) since it's lighter weight. something about the default UI of recent ubuntu slows down the playback.
when i play video with mplayer using the hardware decode (-fs -vo vdpau -vc ffh264vdpau) it used to work great (~3 months ago). but now i get occasional pauses. they are really bad, not just a dropped frame but playback freezes for 0.2-0.5 seconds. of course this ruins my experience. it happens about once every couple of minutes. the CPU usage while playing back is like 2%, and there are two cores. and this used to work fine.
so there would seem to be a regression in X or the kernel or the graphics drivers or ?? you tell me.