[LAU] stalling/freezing eee900

Hi I have inherited an old eee900. It needs a new battery, but with that I hope to use it for synth engine (like Ken Restivo) and more. However, before I get a new battery, there's a problem that I hope some here could help with. Every once in a while it's like X kind-of stalls or freezes for 10-20 seconds or so. If it's generating audio I seem to remember that that's not being interrupted in any ways. It's like it's waiting for a slow disk or something. It's now running arch, but I had various ubuntus running on it before, and I seem to remember that it's always behaved like that. Any clues what this could be or how to approach the problem. Can you recognize this from your eee, Ken? -- Atte http://atte.dk http://modlys.dk