Yes, the audio device is a UAC1 device, and it used set_sample_rate_v1 to set sample.

So, I add a quirk to keep up the USB interface up even if the audio stream is closed.

----

主ãé¢ï¼Re: åå¤: Re: [PATCH] ALSA: usb-audio: fix Hamedal C20 usb camero disconnect issue æ¥ãæï¼2022-11-04 17:59 å件人ï¼Takashi Iwai æ¶ä»¶äººï¼è¾è¶

On Fri, 04 Nov 2022 10:50:48 +0100, è¾è¶ wrote:

I 'm sorry, I don't know whether you receiver my mail for 'lsusb -v'

to

Hamedal C20

I received your previous mails including lsusb -v output. But the post was filtered out by some reason? So the audio device looks like a UAC1 device. And this one requires to keep up the USB interface up even if the audio stream is closed (not about the parameter changes)? Takashi