From owner-freebsd-current Wed Dec 15 2: 8:50 1999 Delivered-To: freebsd-current@freebsd.org Received: from herring.nlsystems.com (nlsys.demon.co.uk [158.152.125.33]) by hub.freebsd.org (Postfix) with ESMTP id 857991539C; Wed, 15 Dec 1999 02:08:45 -0800 (PST) (envelope-from dfr@nlsystems.com) Received: from salmon.nlsystems.com (salmon.nlsystems.com [10.0.0.3]) by herring.nlsystems.com (8.9.3/8.8.8) with ESMTP id KAA45980; Wed, 15 Dec 1999 10:18:14 GMT (envelope-from dfr@nlsystems.com) Date: Wed, 15 Dec 1999 10:18:13 +0000 (GMT) From: Doug Rabson To: Andrew Gallatin Cc: freebsd-current@freebsd.org, tanimura@freebsd.org Subject: Re: ESS1688 newpcm support, soundblaster panics at boot In-Reply-To: <14422.37057.798245.620736@grasshopper.cs.duke.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Tue, 14 Dec 1999, Andrew Gallatin wrote: > > I have an old, wheezing Dell Lattitude LM with an ESS1688 sound chip. > (specs at http://support.dell.com/docs/systems/pespmmx/specs.htm) > > I have managed to get newpcm to find the 1688 via 'options PNPBIOS' > and the following patch: I've added this to my sources. I'll commit it after I get the rest working. > > However, the machine now panics on boot in sbchan_init(), at line 821 > of sb.c with a page fault on access to virtual address 0x14: > > I strongly suspect that this is due to the fact that this card has > only 1 dma channel. I suspect the panic is caused by > rman_get_start(sb->drq2) when sb->drq2 is null. > > Does newpcm even support simplex operations on soundblaster chips? I > ask because I simply could not get simplex operations to work on my > wss cards, so I suspect that simplex operation is simply not well > tested. It is supposed to support simplex but that support has changed recently so perhaps it broke. I already have a report that the ESS1888 is broken at the moment and I will be fixing it as soon as I find a spare couple of hours to tackle it (I have an ESS1888 in my miata). > > Can anybody who is more familiar with newpcm please point me in the > right direction? Not sure where to look yet. Something is probably passing a NULL channel. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message