From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E5499C4360C for ; Wed, 3 Mar 2021 21:21:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B22E964EF8 for ; Wed, 3 Mar 2021 21:21:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1581046AbhCCTfe (ORCPT ); Wed, 3 Mar 2021 14:35:34 -0500 Received: from mx2.suse.de ([195.135.220.15]:41974 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351020AbhCCTXU (ORCPT ); Wed, 3 Mar 2021 14:23:20 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 684A3ACBC; Wed, 3 Mar 2021 19:22:38 +0000 (UTC) Date: Wed, 03 Mar 2021 20:22:38 +0100 Message-ID: From: Takashi Iwai To: John Ernberg Cc: "perex@perex.cz" , "tiwai@suse.com" , "alsa-devel@alsa-project.org" , "linux-kernel@vger.kernel.org" , "kempe@lysator.liu.se" Subject: Re: [PATCH] ALSA: usb: Add Plantronics C320-M USB ctrl msg delay quirk In-Reply-To: <20210303181405.39835-1-john.ernberg@actia.se> References: <20210303181405.39835-1-john.ernberg@actia.se> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/25.3 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 03 Mar 2021 19:14:39 +0100, John Ernberg wrote: > > The microphone in the Plantronics C320-M headset will randomly > fail to initialize properly, at least when using Microsoft Teams. > Introducing a 20ms delay on the control messages appears to > resolve the issue. > > Link: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/1065 > Tested-by: Andreas Kempe > Signed-off-by: John Ernberg > --- > > Note: Microsoft Teams is the only application tests have been performed with > and no other kinds of investigations have been performed, like USB packet logging. > Originally reported as a possible PulseAudio issue, where it was suggested to > try a delay quirk in the kernel. > If other tests should be performed, please let me know which tests and I will try to do them. > > All testing was done on 5.10, patch was then applied on sound.git master for submission > > I did not register to the mailing lists, please keep me CC on any comments. Thanks! Thanks, applied now. It's a good timing, as I've recently got a bug report for the similar device (C320) showing mysterious behavior on Teams :) Takashi