[LAU] Something odd

Background. I often use my 'office' machine (64 bit dial core Intel - debian 8) to do experimental work on audio software as I don't want to take risks with my DAW. Sometimes I use a KA6, other times the motherboard sound depending on what I want to check. However, I've got into the habit of leaving the KA6 plugged in anyway. Recently I've noticed that if I have jack running through the motherboard audio, I get exactly 1 Xrun approximately every 11 minutes. This doesn't happen if the KA6 is not plugged in, nor does it happen if I route jack's audio through it. If this was some USB issue I would have expected it to be there when routing through the KA6 as well. Any ideas? As an aside, I can run the KA6 at 1/2 the buffer size of the motherboard audio and still get no Xruns, when the latter is getting quite croaky. -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.