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