On 09/07/2010 08:50 AM, Clemens Ladisch wrote: > Joan Quintana wrote: >> It seems that my new laptop has a buggy USB controller (lspci says >> 'Intel Corporation 5 Series/3400 Series Chipset USB2') and this causes >> JACK to fail in 'duplex mode' and 'only recording mode' >> >> $ /usr/bin/jackd -dalsa -dhw:2 -r44100 -p1024 -n2 >> ... >> ALSA: could not start playback (Broken pipe) >> DRIVER NT: could not start driver >> ... >> >> I have an Edirol UA-25EX. >> >> I read about this problem in: >> *http://ubuntuforums.org/showthread.php?p=9812317 >> where points to >> *http://lists.linuxaudio.org/pipermail/linux-audio-user/2010-June/070365.html > > If you had this buggy controller, the sound output would be silent or > garbled, but the driver wouldn't be able to detect this. > > Your error messages show that there is some other problem. > > Is there some error message in the system log when this happens? > Hello Clemens, I've tested this on a PC with the exact same chipset and this is the error message in the system log when I start JACK in duplex mode: [ 6894.097634] usb 1-1.4: new full speed USB device using ehci_hcd and address 14 [ 6894.195761] usb 1-1.4: configuration #1 chosen from 1 choice [ 6930.941407] cannot submit datapipe for urb 0, error -28: not enough bandwidth More info here: http://ubuntuforums.org/showpost.php?p=9844242&postcount=20 Best, Jeremy _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
