From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: Audio USB disappears suddenly
Date: Wed, 10 Dec 2014 21:03:10 +0100
Message-ID: <5488A6FE.5080308@ladisch.de>
References: <CAM4quvZC3L_mcQtt3giUjUqVnN1N1A05m=fP379xh61TDi_-mg@mail.gmail.com>
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To: mobidyc <mobidyc@gmail.com>, alsa-devel@alsa-project.org
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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