From owner-freebsd-current@FreeBSD.ORG Thu Oct 21 17:25:56 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id AC93E16A4CE for ; Thu, 21 Oct 2004 17:25:56 +0000 (GMT) Received: from carver.gumbysoft.com (carver.gumbysoft.com [66.220.23.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9158143D48 for ; Thu, 21 Oct 2004 17:25:56 +0000 (GMT) (envelope-from dwhite@gumbysoft.com) Received: by carver.gumbysoft.com (Postfix, from userid 1000) id 811F572DD4; Thu, 21 Oct 2004 10:25:56 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by carver.gumbysoft.com (Postfix) with ESMTP id 7C4E672DCB; Thu, 21 Oct 2004 10:25:56 -0700 (PDT) Date: Thu, 21 Oct 2004 10:25:56 -0700 (PDT) From: Doug White To: Travis Poppe In-Reply-To: <20041019111518.1f6a76a4@maya.liquidx.org> Message-ID: <20041021102205.C37069@carver.gumbysoft.com> References: <20041019111518.1f6a76a4@maya.liquidx.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-current@freebsd.org Subject: Re: Mild sound distortion with FreeBSD 5.3-BETA7 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Oct 2004 17:25:56 -0000 On Tue, 19 Oct 2004, Travis Poppe wrote: > I've recently noticed a mild sound distortion in XMMS and other > applications that output sound. I'm not sure when I started noticing > this, but I don't believe it has always been present in the 5.x branch > (and if it has, I haven't noticed it up until a month or two ago). Problems with sound disruptions can usually be traced to running with WITNESS and/or INVARIANTS compiled into your kernel. These debugging options cause enough interrupt latency to cause sound problems. Even setting the sysctl debug.witness_watch=0 (I guess its debug.witness.watch=0 now) will usually clear the issue right away, or reduce the disruptions significantly (for that boot only). If the sysctl doesn't exist then you don't have WITNESS. -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org