[ALSA - utils 0001326]: ISA cards (opl3sa2 in particular) are not detected properly on 2.6 kernels

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
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<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1326> 
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Reported By:                ahaning
Assigned To:                perex
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Project:                    ALSA - utils
Issue ID:                   1326
Category:                   alsaconf
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
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Date Submitted:             08-10-2005 03:39 CEST
Last Modified:              08-12-2005 15:14 CEST
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Summary:                    ISA cards (opl3sa2 in particular) are not detected
properly on 2.6 kernels
Description: 
When brute-force detecting my OPL3SA2 card, the IRQ and DMA1/DMA2 settings
are incorrectly detected by alsaconf from alsa-utils. For example, the
default BIOS settings are IRQ=11, DMA1=0, DMA2=1, but alsaconf detects
IRQ=5, DMA1=1, DMA2=0. No matter the BIOS settings, alsaconf always
detects those settings (IRQ=5, DMA1=1, DMA2=0). If I set the BIOS settings
to that, then the card will make sound (after touching the mixer while
playing audio).

According to perex (author of the opl3sa2 driver):

"The alsaconf tries to gather free resources (irq/dma/ports) from the
/proc filesystem. It might be extended to gather this information also
from /sys filesystem."
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Relationships       ID      Summary
----------------------------------------------------------------------
related to          0000879 (snd_)opl3sa2 (isa) doesn't work (fails...
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----------------------------------------------------------------------
 ahaning - 08-12-05 12:54 
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According to Gateway's site <
http://support.gateway.com/s/Mobile/Solo_Series/P2500/p250044.shtml#P46_3484
> my notebook uses a "Neomagic NMA 2" sound card. It also has a Neomagic
video card, so it's possible that those two entries are from the video.
That said, the OPL3SA2 driver is the only one that has ever worked for
me.

It appears that the DMAs are the only parts that have to be forced
correctly. I tried setting DMA1 to 3 and DMA2 to 0 in the BIOS. They
weren't detected correctly, but when I fixed that part in
/etc/modprobe.conf, sound worked (after touching the mixer while
playing).

I can add some /proc or /sys output here later.

----------------------------------------------------------------------
 perex - 08-12-05 15:14 
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Okay, after some thoughs, we cannot do more. The BIOS disables for some
reason the ISAPnP configuration for your opl3sa2 card. You may also try
pnpdump on 2.4 kernel to be 100% that the card does not respond to ISA PnP
requests.

The legacy (non-PnP) configuration is always problematic and resources
must be specified manually according BIOS.

There is no way to read the "right" values from hardware...

Issue History
Date Modified  Username       Field                    Change              
======================================================================
08-10-05 03:39 ahaning        New Issue                                    
08-10-05 03:39 ahaning        Distribution              => Slackware 9.1 (but
it's not distribution-specific)
08-10-05 03:39 ahaning        Kernel Version            => 2.6.12.2        
08-10-05 13:26 perex          Status                   new => assigned     
08-10-05 13:26 perex          Assigned To               => perex           
08-10-05 13:26 perex          File Added: alsaconf                         
08-10-05 13:28 perex          Note Added: 0005747                          
08-10-05 13:29 perex          Project                  ALSA - driver => ALSA -
utils
08-10-05 13:30 perex          Relationship added       related to 0000879  
08-10-05 13:31 perex          Category                 1_OTHERS => alsaconf
08-10-05 14:55 ahaning        Note Added: 0005748                          
08-11-05 00:24 ahaning        Note Added: 0005752                          
08-11-05 23:59 ahaning        Note Added: 0005763                          
08-12-05 00:00 ahaning        Note Edited: 0005763                         
08-12-05 03:09 ahaning        Note Added: 0005764                          
08-12-05 09:29 perex          Note Added: 0005766                          
08-12-05 12:54 ahaning        Note Added: 0005767                          
08-12-05 15:11 perex          Summary                  ISAPNP cards (opl3sa2 in
particular) are not detected properly on 2.6 kernels => ISA cards (opl3sa2 in
particular) are not detected properly on 2.6 kernels
08-12-05 15:14 perex          Note Added: 0005768                          
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