From alsa-devel-owner@alsa.jcu.cz  Fri Mar 12 04:13:02 1999
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Date: Fri, 12 Mar 1999 03:12:22 +0000 (GMT)
From: Ray Glendenning <ray@hackery.demon.co.uk>
To: alsa-devel@alsa.jcu.cz
Subject: Re: mmap'ed access to /dev/dsp kills ALSA CVS
In-Reply-To: <7c9msk$3m5$1@renehl.ournet.dk>
Message-ID: <Pine.LNX.3.96.990312031052.3123A-100000@hackery.demon.co.uk>
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Hi

Looking at linux-kernel list, there is a thread "FIXED: 3Dfx module broken
on 2.2.3" which mentions some mmap changes in the latest kernels.  I
haven't had time to look at it, but hopefully this will help find the
cause.

Cheers and keep up the good work *8-)

Ray

On 12 Mar 1999, Rene Hojbjerg Larsen wrote:

> Andreas Ehliar wrote:
> > On Thu, Mar 11, 1999 at 05:17:14PM +0000, Rene Hojbjerg Larsen wrote:
> >> It would seem that the latest ALSA CVS version has trouble handling OSS
> >> compatible mmap'ed access to /dev/dsp.  Specifically, when I exit Quake II
> >> (which uses mmap'ed sound) the primary PCM channel on my sound card
> >> (SB PCI128) locks up.  The status of the PCM channel when in this state is
> > 
> > <snip>
> > 
> >> The problem started when I upgraded from 0.3.0pre4 to the current CVS
> >> version.  Some system info:
> > 
> > 
> > For what it's worth, I have the same problem, although my problem started
> > with the change from 2.2.2 to 2.2.3
> 
> That makes sense to me.  I upgraded the kernel at the same time as ALSA,
> but I just assumed that ALSA was to blame.  Still, there is a problem to
> adress for either the kernel or the ALSA developers.
> 
> > Version/cardinfo:
> > ehliar@angreal:/proc/asound>cat version 
> > Advanced Linux Sound Architecture Driver Version 0.3.0-pre4.
> > Compiled in Mar  9 1999 for kernel 2.2.3 (SMP).
> > ehliar@angreal:/proc/asound>cat cards 
> > 0 [card1          ]: SB16 - Sound Blaster 16
> >                      Sound Blaster 16 at 0x220, irq 5, dma 1&5
> 
> -- 
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