Hi All,<br><br>I&#39;m having a very strange problem setting up Jack.<br><br>I have a card which aplay -l lists as<br><br>card 0: SB [HDA ATI SB], device 0: ALC892 Analog [ALC892 Analog]<br>  Subdevices: 1/1<br>  Subdevice #0: subdevice #0<br>

card 0: SB [HDA ATI SB], device 1: ALC892 Digital [ALC892 Digital]<br>  Subdevices: 1/1<br>  Subdevice #0: subdevice #0<br><br>I&#39;m only interested in the analog outputs.<br><br>when I start up jackd (from qjackctrl), I am offered three different options for my sound interface:<br>

<br>hw:0     HDA ATI SB<br>hw:0,0  ALC892 Analog<br>hw:0,1  ALC892 Digital<br><br>(input devices are similar)<br><br>However, when I start up jackd, I get a constant stream of xruns.  This is true regardless of what combination of input and output hardware device I choose, as well as real-time settings and period size (I obviously haven&#39;t tested everything, but a large representative swath).<br>

<br>On the other hand, if I choose plughw:0, jackd gives me a warning, but I can get zero xruns and no artifacts for as low as 128 frames/period.<br><br>Similarly, if I start jack with the dummy driver, and then run alsa_in, I can get down to 32 frames/period with no artifacts nor xruns.<br>

<br>What could be going on?<br><br>Thanks,<br>Jeremy<br>