<SNIP> > a) autorun trying to play CDs automatically I guess I don't understand this. If you're simply referring to the CD player being busy, I'm not running the CD Player while recording. <SNIP> Yes, but the windowing system, like KDE, creates a process called 'autorun' that looks at the CD once per second to see if I've installed a CD, so that it can start playing it. That work that it does each second can cause xruns. Gnome does something similar. Many of us were having that problem last year, but I never discovered how to stop it. In KDE I just kill the autorun process. Fluxbox (and others I'm sure) don't do this, so you get fewer problems. Good luck getting this debugged.