[ubuntu] Perf tuning v11.10 on Acer Revo

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http://ubuntuforums.org – I've got the latest Ubuntu (11.10) installed on my little Acer Revo. All the h/w works great, including HDMI output to my receiver (and subsequently TV). The problem is that it hiccups when playing music via RhythmBox. Sometimes for a 1/2 second, sometimes for 3-4 seconds at a time. The frequency is random, once every few songs or so. My MP3s are all high-quality VBR (does this require significantly more CPU?). I also have the occasional jerkiness when playing a movie with VLC Media Player, but this is pretty rare, and not a concern. 1. Is RhythmBox known to be inefficient with h/w? (Hardware)