[ALSA - driver 0001823]: surround40 memory leak

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1823> 
======================================================================
Reported By:                darkbrain
Assigned To:                
======================================================================
Project:                    ALSA - driver
Issue ID:                   1823
Category:                   PCI - cs46xx
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Distribution:               
Kernel Version:             
======================================================================
Date Submitted:             02-05-2006 22:59 CET
Last Modified:              07-25-2006 20:29 CEST
======================================================================
Summary:                    surround40 memory leak
Description: 
It seems that surround40 has a memory leak or somthing similar, playing a
game in surround40 mode the game result unplayable after some minutes. 
And there is a problem in CS46xx.conf file, i need to remove the hook on
the rear pcm to permit multiple surround40 subdevices to be opened.
======================================================================

----------------------------------------------------------------------
 Raymond - 07-25-06 16:03 
----------------------------------------------------------------------
Do the "out of sync" problem occur even 2 or 3 instances of surround40 ?
If yes, there is no way to fix unless you know how to patch the firmware.

The available resource DSP_MAX_PCM_CHANNELS are not enough for 31
subdevices(instances) of surround40 or surround51

If there are only 2 pcm_channels left and pcm_multi try to open surround40
or surround51, it is possible that pcm_multi and cs46xx driver is not
capable to recover from this kind of error.

The au88x0 driver also have this kind of problem
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2228

The driver of the hardware mixing sound card need special handling in
snd_xxx_hw_params() and snd_xxx_hw_free() for OSS emulation too.

----------------------------------------------------------------------
 bitmage2 - 07-25-06 20:29 
----------------------------------------------------------------------
About Raymond's question: I can run 10 instances of "speaker-test -c 6
-Dsurround51 -t wav" without removing the "lock" in the CS46xx.pcm.rear.0
section (I am using no .asoundrc). Instances 1-5 run correct, instances
6-10 produce wrong noises, and instance 11 tells me:
-----
Unable to set hw params for playback: No such device or address
Setting of hwparams failed: No such device or address
-----

If I remove the "lock" (by copying the CS46xx.pcm.rear.0 section to a new
.asoundrc file), the behaviour does *not* change - it is exactly like
described above.

By the way: The CS64xx soundcard I am using is a "Hercules Game Theater
XP7.1".

Issue History
Date Modified  Username       Field                    Change              
======================================================================
02-05-06 22:59 darkbrain      New Issue                                    
02-06-06 06:32 Raymond        Note Added: 0007943                          
02-06-06 07:10 Raymond        Note Edited: 0007943                         
02-06-06 07:31 Raymond        Note Edited: 0007943                         
02-06-06 07:32 Raymond        Note Edited: 0007943                         
02-06-06 10:46 darkbrain      Note Added: 0007945                          
02-06-06 10:46 darkbrain      Note Added: 0007946                          
02-06-06 10:47 darkbrain      Note Deleted: 0007946                        
02-06-06 18:37 darkbrain      Note Added: 0007950                          
02-11-06 15:01 darkbrain      Note Added: 0008018                          
02-12-06 05:09 Raymond        Note Added: 0008025                          
02-15-06 06:21 Raymond        Note Added: 0008076                          
02-21-06 07:56 Raymond        Note Added: 0008152                          
03-27-06 04:42 Raymond        Note Added: 0008987                          
06-02-06 09:33 Raymond        Note Deleted: 0008152                        
06-02-06 09:33 Raymond        Note Deleted: 0008987                        
06-02-06 09:34 Raymond        Note Deleted: 0008076                        
07-11-06 13:28 Raymond        Note Added: 0010970                          
07-24-06 21:21 bitmage2       Note Added: 0011215                          
07-24-06 21:25 bitmage2       Note Added: 0011216                          
07-25-06 02:41 Raymond        Note Added: 0011222                          
07-25-06 05:47 Raymond        Note Edited: 0011222                         
07-25-06 10:18 darkbrain      Note Added: 0011224                          
07-25-06 16:03 Raymond        Note Added: 0011228                          
07-25-06 20:29 bitmage2       Note Added: 0011231                          
======================================================================



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