From owner-freebsd-hackers@FreeBSD.ORG  Mon Apr 23 06:59:34 2012
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 9399F106564A
	for <freebsd-hackers@freebsd.org>; Mon, 23 Apr 2012 06:59:34 +0000 (UTC)
	(envelope-from yuri@rawbw.com)
Received: from shell0.rawbw.com (shell0.rawbw.com [198.144.192.45])
	by mx1.freebsd.org (Postfix) with ESMTP id 61FCB8FC0C
	for <freebsd-hackers@freebsd.org>; Mon, 23 Apr 2012 06:59:34 +0000 (UTC)
Received: from eagle.yuri.org (stunnel@localhost [127.0.0.1])
	(authenticated bits=0)
	by shell0.rawbw.com (8.14.4/8.14.4) with ESMTP id q3N6xMix075512;
	Sun, 22 Apr 2012 23:59:23 -0700 (PDT) (envelope-from yuri@rawbw.com)
Message-ID: <4F94FDCA.6050003@rawbw.com>
Date: Sun, 22 Apr 2012 23:59:22 -0700
From: Yuri <yuri@rawbw.com>
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
	rv:10.0.3) Gecko/20120316 Thunderbird/10.0.3
MIME-Version: 1.0
To: Hans Petter Selasky <hselasky@c2i.net>
References: <4F94A7A4.5080203@rawbw.com> <201204230754.49422.hselasky@c2i.net>
In-Reply-To: <201204230754.49422.hselasky@c2i.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-hackers@freebsd.org
Subject: Re: Can't unload snd_uaudio: it hangs in D+ state
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 23 Apr 2012 06:59:34 -0000

On 04/22/2012 22:54, Hans Petter Selasky wrote:
>
> If it says in dmesg that an application is using a device, that is a problem
> with the PCM layer, that doesn't support detach of devices if they are in use.

Other snd_xxx.ko can't be unloaded when in use, ex:
# kldunload snd_es137x.ko
kldunload: can't unload file: Device busy

Something is different with snd_usound.ko

Yuri