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Date: Wed, 12 Nov 1997 12:19:43 -0800 (PST)
From: Doug White <dwhite@gdi.uoregon.edu>
Reply-To: Doug White <dwhite@resnet.uoregon.edu>
To: Tim Jensen <toast@plasma.engr.arizona.edu>
cc: questions@FreeBSD.ORG
Subject: Re: DMA problem
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On Fri, 7 Nov 1997, Tim Jensen wrote:

> I recently upgraded from 2.1.5-REL to 2.2.2-REL and seem to be having a
> problem using my sound card now.
> 
> Nov  7 12:19:58 plasma /kernel: gus0 at 0x220 irq 11 drq 1 on isa
> Nov  7 12:19:58 plasma /kernel: gus0: <Gravis UltraSound MAX (512k)>
> Nov  7 12:19:58 plasma /kernel: gus0: <GUS MAX (CS4231)>
> 
> I never had any problems running mpg123 before, but after I upgraded I get
> the following messages while using it:
> 
> Nov  7 11:49:58 plasma /kernel: isa_dmastart: channel 1 busy
> Nov  7 11:50:29 plasma last message repeated 179 times
> Nov  7 11:52:30 plasma last message repeated 652 times

This is a diagnostic message, although it is coming through a little too
quickly.  You can disable the printf in /sys/i386/isa/isa.c line 654 to
shut it up tho.

> None of the other audio software I've used (RealPlayer, mxv, etc.) gives
> me those errors. Nothing else should be using DMA channel 1, as far as I
> can tell.
> 
> Has anyone else experienced this problem? Should I configure my GUS to use
> a different DMA channel? Is there a simple fix I am completely missing?

The GUS MAX driver is probably suffering from bitrot.  Try pestering
multimedia@freebsd.org and see if they have an updated driver.

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major