Adding the linux-usb mailing , maybe someone from there will be able to help with this. On Sun, Feb 25, 2018 at 12:45 PM, Marius Cirsta <mforce2@xxxxxxxxx> wrote: > Hi, > > Thanks for your answer. > > Yes, I tried reverting just that commit on top of kernel 4.15.5 and > there was no change so I too suspect it's something from USB core > related to the quirks that this webcam needs. > > Regards, > > Marius Cirsta, > > mforce2@xxxxxxxxx > > On Sun, Feb 25, 2018 at 11:45 AM, Takashi Iwai <tiwai@xxxxxxx> wrote: >> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
