[ALSA - driver 0000952]: System freeze at end of MIDI playback

[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=952> 
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Reported By:                skunk
Assigned To:                
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Project:                    ALSA - driver
Issue ID:                   952
Category:                   PCI - emu10k1
Reproducibility:            random
Severity:                   crash
Priority:                   normal
Status:                     new
Distribution:               Debian testing
Kernel Version:             2.6.8-2-k7
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Date Submitted:             03-01-2005 06:28 CET
Last Modified:              06-28-2006 00:03 CEST
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Summary:                    System freeze at end of MIDI playback
Description: 
Hardware: Sound Blaster Live! Value
Software: sfxload (for patch loading) and drvmidi (playback)

I often play a list of MIDI files. On a number of occasions---either at
the end of a MIDI song, or when I hit STOP---the computer has frozen hard.
The recurrence is rare enough to make this more an annoyance than a
showstopper, but then, I haven't been too keen on ferreting out this bug.

I am reporting this against ALSA from the 2.6.8 kernel, as that is what
I'm using now (Debian official package) but the same problem arose with
alsa-driver 1.0.8 (as compiled by me) on 2.4.29.

I could probably rig up something to start/stop MIDI playback repeatedly,
with a debug-compiled driver, but is there any way to get useful debugging
output when the bug takes the whole system down?
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----------------------------------------------------------------------
 phorn - 06-27-06 23:43 
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I am also getting this bug pretty often (kernels 2.6.15 through 2.6.17.1).

I get no useful indication when using SMP.  The only way to tell is that
"pmidi" frezes in the "running" state, and half of the I/O devices
(keyboard, ethernet and sometimes harddrive) stop working.

I decided to disable SMP and then I got a nice kernel message which I
attached as kernel_spinlock-2.6.17.1-nosmp.txt

----------------------------------------------------------------------
 rlrevell - 06-28-06 00:03 
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Can you verify the bug is still present in the latest Hg sources?

Issue History
Date Modified  Username       Field                    Change              
======================================================================
03-01-05 06:28 skunk          New Issue                                    
03-01-05 06:28 skunk          Distribution              => Debian testing  
03-01-05 06:28 skunk          Kernel Version            => 2.6.8-2-k7      
09-19-05 10:10 jdthood        Note Added: 0006287                          
09-19-05 10:19 skunk          Note Added: 0006290                          
04-23-06 07:57 skunk          Note Added: 0009441                          
06-07-06 18:09 pen            Note Added: 0010085                          
06-07-06 18:09 pen            Issue Monitored: pen                         
06-07-06 18:23 rlrevell       Note Added: 0010086                          
06-07-06 19:45 pen            Note Added: 0010087                          
06-07-06 19:50 rlrevell       Note Added: 0010088                          
06-08-06 09:28 skunk          Note Added: 0010109                          
06-27-06 23:35 phorn          File Added: kernel_spinlock-2.6.17.1-nosmp.txt    
               
06-27-06 23:43 phorn          Note Added: 0010602                          
06-28-06 00:03 rlrevell       Note Added: 0010603                          
======================================================================



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