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Re: USB sound device present but visible in ‘alsamixer’

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On Sun, Feb 6, 2022, 9:42 AM Pankaj Jangid <pankaj@codeisgreat.org> wrote:

> 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.
> >
> > However, ‘lsusb’ shows it and ‘/proc/asound/cards’ has an entry. But
> > these devices (mic and speaker) are not taking any input or producing
> > sound. Because they are not visible to Gnome and ‘alsamixer’.
> >
> > pankaj@anant:~$ lsusb
> > ...
> > Bus 001 Device 003: ID 046d:0ab7 Logitech, Inc. Blue Microphones
> > ...
> > pankaj@anant:~$ cat /proc/asound/cards
> > ...
> >  3 [Microphones    ]: USB-Audio - Blue Microphones
> >                       Generic Blue Microphones at usb-0000:2a:00.1-2,
> high speed
> > ...
>
> I am trying to make it work; so here is the update.
>
> I tried to experiment with my machine and found that if I plug-out and
> plug-in the USB sound card again, it is not shown by "aplay -l" command
> as normal user. But when I do "sudo aplay -l" it lists the USB
> device. But I am part of "audio" group. "groups" command output:
>
> --8<---------------cut here---------------start------------->8---
> ankaj@anant:~$ groups
> pankaj cdrom floppy sudo audio dip video plugdev netdev bluetooth scanner
> docker
> --8<---------------cut here---------------end--------------->8---
>
> I don’t know what other configuration is required to list my card using
> "aplay -l" as a normal user?


You may need to give normal users added privileges. Or it may be that you
need to set your running group or user identity to something else in order
to use aplay effectively. Could that be the group named audio?

See help for the newgrp command. Or just as you have done, try to craft the
right sudo command to invoke it the way you want. Then you could add a
shorthand to it in sudoers or create a shell alias accordingly.

Or, not recommended, you could change the aplay executable or front-end to
it in order to make it a set[ug]id executable.

It lists the card when I reboot the
> machine. But not when I plug-out and plug-in again. Any hints for this?
>
> This could be root cause of my original problem i.e. no sound after
> sleep and wake-up.
>
>
>

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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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