Logitech Z10 USB speakers need a volume change before audio works

[Takashi Iwai]

On Thu, 25 Nov 2021 12:04:41 +0100,
Hans de Goede wrote:
> 
> Hi,
> 
> I've a set of Logitech Z10 USB speakers, which act as a USB soundcard.
> 
> They have this weird glitch where after turning off my PC (and their
> power-supply as well) and then turning things back on, they are silent
> until I change the PCM volume control for the speakers inside
> alsa-mixer.
> 
> It seems like they need some "set-volume" command to be send over the
> USB bus to unmute them when initially powered-up / turned on.
> 
> Is their some existing usb-audio quirk which I can try to work around this?

No such quirk is present for now.

Was it tested with 5.16-rc?  There was a change in USB-audio driver
initialization (commit b96681bd5827) and it might have some effect in
your case.

Also, it's interesting to know whether it happens also once after
suspend-resume, too.


thanks,

Takashi