Have a box I have just put MDK 10.0 Community on. Shuttle A39k Mobo, Athalon XP 2600, 512MB, Via chipset...Shows realtek chip on soundcard in Alsa mixer. Have installed Thacs 2.6.5 MM kernel, modprobed "realtime allcaps=1" manually. Installed the regular set of apps also from Thacs recently updated page for 10.0; Qjackctl Jackit .98 Ardour most recent etc,etc,etc. I can get Jack to fire up no problems but the Xrun callbacks run like crazy! It seems to do it only on the playback side of the duplex I/O. (tested in options of Qjackctl) Does not appear to do it on Capture. Ardour connects as client etc. Seems fine although I've not tried to record anything yet. Just realized that the only thing I have not set up is "tmpfs" although I did on the last install with the exact same setup and it still did the same thing. Any ideas?? Thanks Just in case I ain't said it lately, This Linux community is the GREATEST~~~ ;)