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Date: Tue, 12 Jan 1999 01:44:11 +0100
From: Andras Wappel <alw@freemail.c3.hu>
To: Jaroslav Kysela <perex@jcu.cz>
Cc: alsa-user@alsa.jcu.cz
Subject: Re: gus pnp + simultaneous pcm 0,1 playback
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In-Reply-To: <Pine.LNX.3.96.981130090445.21999A-100000@entry.jcu.cz>; from Jaroslav Kysela on Mon, Nov 30, 1998 at 09:05:49AM +0100
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Hello Jaroslav,

On Mon, Nov 30, 1998 at 09:05:49AM +0100, Jaroslav Kysela wrote:
> On Mon, 30 Nov 1998, Andras Wappel wrote:
> 
> > Hello ALSA users !
> > 
> > 
> > Should the subj. work already ?
> > I mean playing audio samples with aplay on pcm0 and pcm1 at the same time ?
> > 
> > What I tried is:
> > aplay -d 0 something.wav
> > (on another console)
> > aplay -d 1 another.wav , and I get: 
> > Aplay: version 0.0.8 by Jaroslav Kysela <perex@jcu.cz>
> > Error: audio open error: Device or resource busy
> > 
> > starting with pcm1 yields the same result - so both devices work , but not at the
> > same time.
> > 
> > ps. here is some driver info:
> > 
> > Advanced Linux Sound Architecture Driver Version 0.2.0-pre10p1.                 
> > Compiled in Nov 23 1998 for kernel 2.0.36.  
> > 
> > cards:
> > 
> > 0 [card1          ]: IW - InterWave                                             
> >                      AMD InterWave at 0x220, irq 5, dma 0                          
>                                                       ^^^^^
> If you want use both PCM devices at same time, you must configure ALSA
> driver for two DMA mode. One DMA isn't enough.
> 
> 							Jaroslav
> 

I'm using driver 0.3.0-pre2 on a 2.2-pre5 kernel, and have the following problems:

Playin two mp3-s (mpg123) stil doesnt really work, although card's using two dmas:

0 [card1          ]: IW - InterWave
                     AMD InterWave at 0x220, irq 11, dma 5&7

pcm1 plays back nice, pcm0 slow and choppy. the same symptoms are reported by irc friend who
uses same driver/card.


When trying to play back two wav-s at the same time with aplay, it's choppy too,
then my machine locks up after a 10-20 sec-s ! 
I suspect a crappy card, because I get checksum error from builtin isapnp driver
at alsa startup. (irc friend reports choppy playback, too, without the lock-up, btw he has no checksum errors
on startup).

isapnp: checksum for device 1 isn't valid (0xe9)
isapnp: Device 'UltraSound Plug & Play'
isapnp: 1 Plug & Play device detected total

So, what should I check to track down the cause of my problems ?
What other info should I report ?


Thanks for any ideas,

			    Andras


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