[LAD] ? jack/qjackctl XRUN info

[Eliot Blennerhassett]

Greetings,

what does it mean when I get messages like this in the qjackctl window?
(or where should I look to find out)

14:21:16.546 XRUN callback (2 skipped).
14:21:23.026 XRUN callback (908).
14:21:24.594 XRUN callback (1 skipped).
14:21:27.767 XRUN callback (910).
14:21:28.617 XRUN callback (7 skipped).
14:21:30.632 XRUN callback (7 skipped).

AFAIK I am not getting actual xruns - I don't get any message like this, and 
my audio sounds OK.
**** alsa_pcm: xrun of at least 2721.798 msecs

The XRUN callbacks only happen when I use an alsa multi device (2 stereo 
substreams linked and synched together), not when I use a single stereo 
substream.

thanks

Eliot