[alsa-devel] Audio USB disappears suddenly

[Johan Aires Rastén]

Please try the following commands when the card is recently plugged in and
working and post the output:

lsusb -d 249c:9313 -v

amixer -c 1 contents

Assuming 249c:9313 is your card's ID and that it's still enumerated as card
1 in your system. The output from lsusb might be very long so it could be
better to use pastebin.com or similar.

//Johan

On 11 December 2014 at 01:13, mobidyc <mobidyc at gmail.com> wrote:
>
> Thanks for this information,
>
> I think it's time to contact the manufacturer.
>
> Do you know if I can take some relevant traces (kernel module to load,
> /proc/asound file to parse, anything else)?
> so I can detail my email to him.
>
> Thanks.
>
> --
> Mobidyc
>
> 2014-12-10 21:03 GMT+01:00 Clemens Ladisch <clemens at ladisch.de>:
>
> > mobidyc wrote:
> > > USB DAC suddenly disappears, from dmesg I can see:
> > >
> > > [13083.161157] usb 1-1.3: 1:2: usb_set_interface failed (-110)
> > > [13083.316344] usb 1-1.3: 1:2: usb_set_interface failed (-71)
> > > [13083.471927] usb 1-1.3: 1:2: usb_set_interface failed (-71)
> > > [13083.789810] usb 1-1.3: 1:2: usb_set_interface failed (-71)
> >
> > These error codes indicate that the device's firmware does not react at
> > all.  Either the firmware has locked up due to a bug, or the hardware
> > has shut down for some reason.
> >
> >
> > Regards,
> > Clemens
> >
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