On Saturday 01 December 2007 21:38:54 howard peacock wrote: > Hi everyone - thanks for being there. From what I've read, this seems like > a very knowledgeable thread, so I hope someone can help with this... > > I upgraded from ubuntu studio Feisty to studio Gutsy recently, and although > everything sound-wise is working fine (i.e. all system sounds and non-jack > dependent audio programs are working fine), I can't get jack to work with > my sound card. > > The sound card is an EMI 2| 6 (usb) - alsa picks it up, and I can select > 'alsa' as my system sound device with no problems. Are you sure jack is trying to use the USB card? my USB cards have never been hw:0 > > starting jackd -d alsa gives this: > > loading driver .. > apparent rate = 48000 > creating alsa driver ... > hw:0,0|hw:0,0|1024|16|48000|0|0|nomon|swmeter|-|32bit control device hw:0 > configuring for 48000Hz, period = 1024 frames, buffer = 16 periods > ALSA: final selected sample format for capture: 24bit little-endian > ALSA: use 16 periods for capture > ALSA: final selected sample format for playback: 24bit little-endian > ALSA: use 16 periods for playback > ALSA: cannot set hardware parameters for playback > ALSA: cannot configure playback channel > cannot load driver module alsa > no message buffer overruns > 01:44:32.686 JACK was stopped successfully. > 01:44:32.686 Post-shutdown script... > 01:44:32.686 killall jackd > jackd: no process killed > 01:44:32.901 Post-shutdown script terminated with exit status=256. > 01:44:34.688 Could not connect to JACK server as client. Please check the > messages window for more info. > > The accompanying /var/log/syslog records this: > Dec 2 01:44:32 ubuntu kernel: [ 7766.542118] cannot submit datapipe for > urb 0, error -28: not enough bandwidth > > I have read around the place that kernels up to 2.6.20 had usb bandwidth > allocation which might have caused this, but I'm using what ubuntu calls > 2.6.22-14-rt. So I shouldn't be getting bandwidth errors. Especially when > the previous kernel worked fine with the same physical configuration of usb > socket + sound card. > > Plus, audacity seems to be able to achieve simultaneous stereo playback and > capture. So it can't be beyond the capacity of the alsa driver... > > Any ideas? I'm not averse to the idea of compiling a new kernel, but I'd > want to be sure that is where the problem is before getting into it.... > > All the best, > Howard all the best, drew _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
