Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756027AbaJUQOq (ORCPT ); Tue, 21 Oct 2014 12:14:46 -0400 Received: from cantor2.suse.de ([195.135.220.15]:52919 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755656AbaJUQOo (ORCPT ); Tue, 21 Oct 2014 12:14:44 -0400 Date: Tue, 21 Oct 2014 18:14:41 +0200 Message-ID: From: Takashi Iwai To: Devin Heitmueller Cc: Hans Verkuil , Shuah Khan , Lars-Peter Clausen , Mauro Carvalho Chehab , Andrew Morton , Greg Kroah-Hartman , Antti Palosaari , "olebowle@gmx.com" , "ramakrmu@cisco.com" , "sakari.ailus@linux.intel.com" , Laurent Pinchart , perex@perex.cz, prabhakar.csengg@gmail.com, Tim Gardner , Sander Eikelenboom , Linux Kernel , alsa-devel@alsa-project.org, Linux Media Mailing List Subject: Re: [alsa-devel] [PATCH v2 5/6] sound/usb: pcm changes to use media token api In-Reply-To: References: <543FB374.8020604@metafoo.de> <543FC3CD.8050805@osg.samsung.com> <543FD1EC.5010206@osg.samsung.com> <543FD892.6010209@osg.samsung.com> <54467EFB.7050800@xs4all.nl> 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/24.3 (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 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org At Tue, 21 Oct 2014 12:08:59 -0400, Devin Heitmueller wrote: > > > Sorry, I'm not convinced by that. If the device has to be controlled > > exclusively, the right position is the open/close. Otherwise, the > > program cannot know when it becomes inaccessible out of sudden during > > its operation. > > I can say that I've definitely seen cases where if you configure a > device as the "default" capture device in PulseAudio, then pulse will > continue to capture from it even if you're not actively capturing the > audio from pulse. I only spotted this because I had a USB analyzer on > the device and was dumbfounded when the ISOC packets kept arriving > even after I had closed VLC. You might have had an input monitor active in some PA apps? PA shouldn't do it as default. If it does unintentionally, you should report it to PA guys. Takashi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/