14 Sep
2010
14 Sep
'10
1:24 p.m.
On 09/07/2010 08:50 AM, Clemens Ladisch wrote:
Joan Quintana wrote:
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
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?