From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: ARC-Seal: i=1; a=rsa-sha256; t=1522944331; cv=none; d=google.com; s=arc-20160816; b=ss40eI+fBrIBphzQDZiUhPs+8UcWzJlwq3iKfaGV4xDOVi+tpfsaQtC5fh+WUjNoUL ZN8raOKF8VWkgRXpZZbHUCH7PbOF5rmpvaA1ATLVdidowm/XdTrm820xCZYAC6aB4W4G Hcw9soygjDv3/0h1aJuwXF74/GIGFOQfBM7STycQsx+wMIF8mQphlg5H3kxCntPcBUFe mo7brqdauKoRQ3ICA3yJD0YjJ6YgePX4EECYB1AF+jhX9GG+FlhFFtlP93qetvwVppmP D5ESPQJeESnpzv8ojgeJfBr8RW5/YoMFHuoT53IKCQb4+wlM11qBgd0cYe0Cl+Ulz5KK 1Rig== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=cc:to:subject:message-id:date:from:mime-version:dkim-signature :arc-authentication-results; bh=YomI7RiqBKcxn/RxLsA1D2/LWwCFCA+Ry9gL7bsaThs=; b=hqLsEJAgb8fzE5YtNNsrkT4DNG6OqiTiDK674m0XIhttBNgHK53R1Biq43JvpATNQv eLEz49dSbsbO7AnrGp8JgQSHmLDnXUYtXlZaDQXIEbRyWtSXern1wwMcx0yqEACDSFE7 ovvo4KR5gHLRzSHUyD8RjH0mQBW3znStxE5vp5+BO3ZpRYRCQJjMkxDhjP/AXqs86bP2 w1VhByMgpOmzTm4YZQG6OdkBCDxM86g/msd89fbveS1Hvehr8T0GacjG8yZvqlb92i/I Jrwwk2ElCt4u7l+EseLN0zm4V8P7C81imMtLo3Lp/3boToImTmtUFRdfFGxq6GhGrqCd HjKw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=unjYnE1r; spf=pass (google.com: domain of mforce2@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=mforce2@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=unjYnE1r; spf=pass (google.com: domain of mforce2@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=mforce2@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com X-Google-Smtp-Source: AIpwx49zrm67BnHeeR4ULhnj//X30Elq92ATDlSN/R+NwNL3E6wogJCnah0Ms9ldEuKihySkvTuj4u8UR6pHO3H/FwE= MIME-Version: 1.0 From: Marius Cirsta Date: Thu, 5 Apr 2018 19:05:29 +0300 Message-ID: Subject: Re: Logitech webcam USB audio breakage during the 4.10 merge window To: linux-usb@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Gabriel C , gregkh@linuxfoundation.org Content-Type: text/plain; charset="UTF-8" X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1596922875548741641?= X-GMAIL-MSGID: =?utf-8?q?1596922875548741641?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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 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@gmail.com > > On Sun, Feb 25, 2018 at 11:45 AM, Takashi Iwai 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