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SubjectRe: Logitech webcam USB audio breakage during the 4.10 merge window
On Sun, 25 Feb 2018 02:53:15 +0100,
Marius Cirsta wrote:
>
> I have a problem that was previously reported here:
>
> https://www.spinics.net/lists/linux-usb/msg156999.html
>
> It seems that with the 4.10-rc1 kernel a regression was introduced
> that makes my Logitech C310 microphone record a distorted ( chipmunk )
> sound. With the 4.9.1 kernel it works perfectly.
>
> Immediately after I plug it into the USB port all is fine but after a
> few minutes this problem occurs.
>
> Also if add this the kernel cmd line : usbcore.autosuspend=-1 it
> also works fine.
>
> One other thing that I've noticed is that if I make the sampling rate
> 22K it again works fine so only the 44K and 48K sampling rates have
> this problem but unfortunately those are the default that Chromium for
> instance uses ( it gets them from pulseaudio )
>
>
> Let me know if you need any more details or testing.

Well it's an old topic, so I don't remember, but did you try to revert
the commit fd1a5059610c as already suggested?

If it doesn't give any difference, it's not about USB-audio driver
side, rather likely some change in USB core.


Takashi

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