[LAD] snd-usb-audio dying on jackd xruns

Rods Bobavich rodnisms at gmail.com
Wed Feb 2 18:42:30 UTC 2011


Neither of those lines have anything that looks like it would trigger an
error.

There are no KERN_ERR calls remotely close.

http://lxr.free-electrons.com/source/drivers/usb/core/urb.c

...Rods ;-)

On Wed, Feb 2, 2011 at 11:20, Gabriel Beddingfield <gabrbedd at gmail.com>wrote:

>
> OK.  Next step is to dig in to what these mean:
>
> [   46.508331] ALSA urb.c:480: frame 0 active: -75
> [   46.560332] ALSA urb.c:480: frame 0 active: -75
> [   98.971734] ALSA urb.c:146: timeout: still 7 active urbs..
> [  104.970917] ALSA urb.c:146: timeout: still 2 active urbs..
> [  121.260876] ALSA pcm.c:223: 4:2:1: usb_set_interface failed
>
> Others might know what these mean.
>
> Me?  I don't.  I'd have to inspect the kernel source code.  urb.c and
> pcm.c are file names in the kernel sources (possibly in the sound/
> folder).  The number after the colon (:) is a line number.  So, if you
> go to urb.c line 480, you see something like printk(KERN_ERR "frame:
> %d active: %d", frame, active);  The code around might give a clue to
> what actually failed.
>
> -gabriel
>
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