[alsa-devel] Audio USB disappears suddenly

[mobidyc]

Hello,

The problem reappears, here is the output you asked for.

lsusb output is here: http://sprunge.us/bOCV


# amixer -c 1 contents
numid=2,iface=MIXER,name='M2Tech Clock Selector Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on
numid=3,iface=MIXER,name='M2Tech Clock Selector Playback Switch',index=1
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=4,iface=MIXER,name='M2Tech Clock Selector Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=127,step=0
  : values=127,127
  | dBminmax-min=-127.00dB,max=0.00dB
numid=5,iface=MIXER,name='M2Tech Clock Selector Playback Volume',index=1
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=127,step=0
  : values=127
  | dBminmax-min=-127.00dB,max=0.00dB
numid=1,iface=PCM,name='Playback Channel Map'
  ; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0
  : values=0,0
  | container
    | chmap-fixed=FL,FR

Hope it will help diagnostics.

--
Mobidyc

2014-12-12 8:17 GMT+01:00 Johan Aires Rastén <johan at oljud.se>:
>
> 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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>>
>