Messages in this thread | | | From | Marius Cirsta <> | Date | Sun, 25 Feb 2018 12:45:51 +0200 | Subject | Re: Logitech webcam USB audio breakage during the 4.10 merge window |
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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@gmail.com
On Sun, Feb 25, 2018 at 11:45 AM, Takashi Iwai <tiwai@suse.de> 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
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