>>usbaudio.c:771: cannot submit datapipe for urb 2, err = -28 > > > This is a kernel bug; it thinks that there isn't enough bandwidth > left. > > Disable CONFIG_USB_BANDWIDTH in the kernel configuration. Thanks for the tip. I've recompiled the kernel with CONFIG_USB_BANDWIDTH disabled. Now jackd does not crash but there is no sound. Playing sound through ALSA with non-jack applications still works OK. Here's the output from /var/log/syslog: Jul 26 09:36:51 localhost kernel: usb 2-1.2: new full speed USB device using uhci_hcd and address 4 Jul 26 09:36:52 localhost usb.agent[7676]: snd-usb-audio: already loaded Jul 26 09:36:52 localhost usb.agent[7676]: audio: blacklisted Jul 26 09:36:52 localhost udev[7769]: configured rule in '/etc/udev/rules.d/udev.rules' at line 51 applied, 'pcmC1D0p' becomes 'snd/%k' Jul 26 09:36:52 localhost udev[7769]: creating device node '/dev/snd/pcmC1D0p' Jul 26 09:36:52 localhost udev[7777]: configured rule in '/etc/udev/rules.d/udev.rules' at line 51 applied, 'pcmC1D0c' becomes 'snd/%k' Jul 26 09:36:52 localhost udev[7777]: creating device node '/dev/snd/pcmC1D0c' Also the USB MIDI interface seems to have stopped working with this kernel. Thanks for your help. Peter Butler
