From owner-freebsd-current@FreeBSD.ORG Sat Mar 29 10:28:38 2003 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 CB62A37B401; Sat, 29 Mar 2003 10:28:38 -0800 (PST) Received: from postal2.es.net (postal2.es.net [198.128.3.206]) by mx1.FreeBSD.org (Postfix) with ESMTP id F3B1643FBF; Sat, 29 Mar 2003 10:28:37 -0800 (PST) (envelope-from oberman@es.net) Received: from ptavv.es.net ([198.128.4.29]) by postal2.es.net (Postal Node 2) with ESMTP id MUA74016; Sat, 29 Mar 2003 10:28:37 -0800 Received: from ptavv (localhost [127.0.0.1]) by ptavv.es.net (Tachyon Server) with ESMTP id B1F0269; Sat, 29 Mar 2003 10:28:35 -0800 (PST) To: Orion Hodson In-Reply-To: Message from Orion Hodson <200303290121.h2T1LjAT046939@puma.icir.org> Date: Sat, 29 Mar 2003 10:28:35 -0800 From: "Kevin Oberman" Message-Id: <20030329182835.B1F0269@ptavv.es.net> cc: Roger Hardiman cc: current@freebsd.org Subject: Re: AC97 sound problems with current 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: Sat, 29 Mar 2003 18:28:42 -0000 > From: Orion Hodson > Date: Fri, 28 Mar 2003 17:21:45 -0800 > Sender: hodson@icir.org > > > Kevin Oberman writes: > | More information on my AC97 experiences: > | > | I forced the card to 4.8 KHz which is what it was running at on V4. This > | seems to have not helped the performance of GnomeMeeting at all. The > | sound I hear is in "spurts" which are at the correct frequency and last > | about a tenth of a second. with gaps between them of about 1 second. > > Is 4.8kHz a typo? It should be 48kHz or 55913Hz depending on your > h/w. Which of the two is all the calibration test is supposed to > determine. Some ac97 controllers on ich based systems seem to end up > using an alternate clock source: XTAL_IN rather than BIT_CLK. The > former clocks the AC97 link at around 55913Hz when it should be at > 48kHz. It wasn't clear to me until recently that this was what was > happening and until some more testing is done I'm not sure if it's a > feature of the ich driver ac97 initialization or just the way it is. Yes, 4.8 KHz was a typo. I meant 48 KHz. My desktop systems (ICH2)m both run at 55913 Hz while my laptop was running at 48 KHz under V4. > I'm currently configuring a laptop to be a netboot server and will > sneak up on an unsuspecting ich machine in the next couple of days and > endeavor to resolve the problem in situ (right now I'm dog tired of > exchanging patches for remote h/w, but that's not to say the offers > are not appreciated in general). Thanks so much. I'm on travel for a week, although I will be on-line using the laptop running current through Wednesday. I'll be more than happy to try patches or provide any information I can to help, though I understand how painful remote debugging can be. (Keeping a national high-performance network running involves way too much use of remote hands, even with lots of out-of-band access capability.) The clocking test failure is easy to work around, so the duplex operation problems are of far more concern as I need duplex for teleconferencing which my job often calls for. Back to Windows and NetMeeting in the interim. :-( R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634