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Re: USB sound device present but NOT visible in ‘alsamixer’

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alsactl --init
may help.
However alsa makes .lock files in /var/lock/alsa and you may find it
helpful to delete the lock file first then once card is set run alsactl
store.  Those lock files sometimes prevent alsa from doing a proper
detection and change.


On Sun, 30 Jan 2022, Pankaj Jangid wrote:

> "Andrew M.A. Cater" <amacater@einval.com> writes:
>
> >> Pankaj Jangid <pankaj@codeisgreat.org> writes:
> >>
> >> > When I boot system afresh, the card is visible in the ?alsamixer? and in
> >> > Gnome settings as well. Shown as ?Blue? S/PDIF input and output
> >> > devices. But when system wakes up from sleep (suspended), it doesn?t
> >> > show the devices.
> >> >
> > It might be nothing more than the power handling, sleep modes and USB
> > enumeration after a laptop goes to sleep.
> >
> > If you unplug/replug the USB plug which is the external sound card, is
> > it magically recognised again?
>
> Thanks Andy, for the reply. I really appreciate this gesture.
>
> And I am sorry I wasn?t complete in the original email. I had tried to
> unplug and replug. But that also doesn?t list the device in ?alsamixer?
> and hence doesn?t work after a suspend/wakeup operation.
>
> Is there a way to force the scan of USB sound devices manually if that
> is not happening automatically? As I had posted earlier that ?lsusb? and
> ?cat /proc/asound/cards? do list the device. It is just that ALSA is not
> seeing it.
>
>
> Regards ~Pankaj
>
>

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Thread

USB sound device present but visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-29 07:30 +0100
  Re: USB sound device present but NOT visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-29 18:00 +0100
    Re: USB sound device present but NOT visible in ‘alsamixer’ "Andrew M.A. Cater" <amacater@einval.com> - 2022-01-29 18:30 +0100
      Re: USB sound device present but NOT visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-30 04:50 +0100
        Re: USB sound device present but NOT visible in ‘alsamixer’ Jude DaShiell <jdashiel@panix.com> - 2022-01-30 05:30 +0100
          Re: USB sound device present but NOT visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-30 06:40 +0100
            Re: USB sound device present but NOT visible in ‘alsamixer’ Jude DaShiell <jdashiel@panix.com> - 2022-01-30 06:40 +0100
              Re: USB sound device present but NOT visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-30 07:00 +0100
                Re: USB sound device present but NOT visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-30 08:10 +0100
                Re: USB sound device present but NOT visible in ‘alsamixer’ Jude DaShiell <jdashiel@panix.com> - 2022-01-30 10:00 +0100
                Re: USB sound device present but NOT visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-30 10:10 +0100
            Re: USB sound device present but NOT visible in ‘alsamixer’ Andrei POPESCU <andreimpopescu@gmail.com> - 2022-01-30 08:10 +0100
              Re: USB sound device present but NOT visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-30 08:20 +0100
                Re: USB sound device present but NOT visible in ‘alsamixer’ Andrei POPESCU <andreimpopescu@gmail.com> - 2022-01-30 09:40 +0100
                Re: USB sound device present but NOT visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-30 10:30 +0100
                Re: USB sound device present but NOT visible in ‘alsamixer’ Andrei POPESCU <andreimpopescu@gmail.com> - 2022-01-30 12:40 +0100
                Re: USB sound device present but NOT visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-01-30 21:20 +0100
                Re: USB sound device present but NOT visible in ‘alsamixer’ Jude DaShiell <jdashiel@panix.com> - 2022-01-31 00:40 +0100
  Re: USB sound device present but visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-02-06 16:50 +0100
    Re: USB sound device present but visible in ‘alsamixer’ Nicholas Geovanis <nickgeovanis@gmail.com> - 2022-02-08 06:10 +0100
      Re: USB sound device present but visible in ‘alsamixer’ Pankaj Jangid <pankaj@codeisgreat.org> - 2022-02-09 14:00 +0100

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