[ALSA - driver 0001869]: Playing surround sound produces 100% CPU load

[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=1869> 
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Reported By:                bitmage2
Assigned To:                
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Project:                    ALSA - driver
Issue ID:                   1869
Category:                   CORE - pcm
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Distribution:               SuSE Linux 10.0
Kernel Version:             Linux 2.6.13-15.8-default #1 Tue Feb 7 11:07:24 UTC
2006 i686 athlon i386 GNU/Linux
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Date Submitted:             02-23-2006 00:48 CET
Last Modified:              07-14-2006 20:59 CEST
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Summary:                    Playing surround sound produces 100% CPU load
Description: 
I am using the CS46xx with a Hercules Gametheater XP 5.1 . It plays back
stereo without problems.
I wanted to use the rest of my 5.1 speaker set, so for a test I ran the
speaker-test program. Running it without parameters or with 2 or 4.0
channels works also fine. So far so good.

But when I run it with 5.0 channels or 5.1 channels the CPU load of
speaker-test goes to 100%. I'll show the output of top along with the
command lines below (for the 2.0 and 5.1 case) in the "Additional
Information" box.



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----------------------------------------------------------------------
 bitmage2 - 07-14-06 20:57 
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I have removed ~/.asoundrc , but the result is the same (100% CPU load with
5.1).

@Raymond: What am I supposed do with the information "center_lfe is device
3" ?!?

----------------------------------------------------------------------
 bitmage2 - 07-14-06 20:59 
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For your information: *After* removing  ~/.asoudrc , the output looks like
this:

chris@bjork:~> speaker-test -Dplug:surround51 --channels 6

speaker-test 0.0.8

Playback device is plug:surround51
Stream parameters are 48000Hz, S16_LE, 6 channels
Using 16 octaves of pink noise
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 16 to 16384
Period size range from 8 to 512
Periods = 4
Buffer time size 2525
To choose buffer_size = 16384
To choose period_size = 4096
was set period_size = 512
was set buffer_size = 16384
 0 - Front Left
 4 - Center
 1 - Front Right
 3 - Rear Right
 2 - Rear Left
 5 - LFE
Time per period = 17,710859


It says "3 - Rear Right", and it actually plays sound at "rear right".

Issue History
Date Modified  Username       Field                    Change              
======================================================================
02-23-06 00:48 bitmage2       New Issue                                    
02-23-06 00:48 bitmage2       Distribution              => SuSE Linux 10.0 
02-23-06 00:48 bitmage2       Kernel Version            => Linux
2.6.13-15.8-default #1 Tue Feb 7 11:07:24 UTC 2006 i686 athlon i386 GNU/Linux
02-23-06 00:54 bitmage2       Note Added: 0008164                          
02-23-06 00:55 bitmage2       Issue Monitored: bitmage2                    
07-11-06 05:58 Raymond        Note Added: 0010964                          
07-14-06 20:57 bitmage2       Note Added: 0011004                          
07-14-06 20:59 bitmage2       Note Added: 0011005                          
======================================================================




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