Date: Wed, 15 Dec 1999 10:18:13 +0000 (GMT) From: Doug Rabson <dfr@nlsystems.com> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: freebsd-current@freebsd.org, tanimura@freebsd.org Subject: Re: ESS1688 newpcm support, soundblaster panics at boot Message-ID: <Pine.BSF.4.10.9912151013250.51079-100000@salmon.nlsystems.com> In-Reply-To: <14422.37057.798245.620736@grasshopper.cs.duke.edu>
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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
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