[ALSA - driver 0001047]: module hangs at seemingly random times

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1047> 
======================================================================
Reported By:                alien999999999
Assigned To:                mjander
======================================================================
Project:                    ALSA - driver
Issue ID:                   1047
Category:                   PCI - au88x0
Reproducibility:            sometimes
Severity:                   block
Priority:                   normal
Status:                     assigned
Distribution:               Mandrake
Kernel Version:             2.6.7
======================================================================
Date Submitted:             04-12-2005 20:43 CEST
Last Modified:              01-04-2006 22:08 CET
======================================================================
Summary:                    module hangs at seemingly random times
Description: 
sometimes i start playing a song, and it starts playing a few second or so
and hangs, then i kill the application and modprobe -r all sound modules
and modprobe them again to make it work again.

BUT: sometimes not only that happens, but also when i try to kill the apps
it will not kill. when that happens, all kill, killall, top, ps aux
commands hang at the command line and cannot be killed by CTRL-C or
otherwise, i have been able to see that when i stopped my display
managener I did an lsmod and it gave something like this:

snd-pcm-oss            59752  11
snd-mixer-oss          20480  1 snd-pcm-oss
snd-au8810             43760  220
snd-ac97-codec         83408  1 snd-au8810
snd-pcm               108172  112 snd-pcm-oss,snd-au8810,snd-ac97-codec
snd-page-alloc         10384  1 snd-pcm
gameport                3840  1 snd-au8810
snd-mpu401-uart        11904  1 snd-au8810


as you can see the snd-au8810 module seem to have an impossible number of
"dependencies" (i think has to do with the number of unclosed sound-apps
trying to be played; this could be since gaim is programmed to execute an
'aplay %s')

i've had this major crash below only 3 times; and the logs didn't detect
anything specific at the time. the only thing the logs mentioned at that
time was an ntpd sync going on; so the only thing i can think of is that
at a certain moment when a sync is going on, some kind of lock is holding
cause this to happen... the only thing that i can do to fix this is
reset...

it is interesting to note that i also have an snd-emu10k1 as second card,
which never gave problems like this, and i am always able to "modprobe -r
snd-emu10k1" ...
======================================================================

----------------------------------------------------------------------
 Raymond - 01-03-06 04:04 
----------------------------------------------------------------------
"if (vortex_adbdma_bufshift(vortex, i)) ;"

It look like snd_pcm_period_elapsed() was called for those substreams
which interrupt have not occurred.


	if (source & IRQ_PCMOUT) {
		/* ALSA period acknowledge. */
		spin_lock(&vortex->lock);
		for (i = 0; i < NR_ADB; i++) {
			if (vortex->dma_adb[i].fifo_status == FIFO_START) {
				if (vortex_adbdma_bufshift(vortex, i)) ;
				spin_unlock(&vortex->lock);
				snd_pcm_period_elapsed(vortex->dma_adb[i].
						       substream);
				spin_lock(&vortex->lock);
			}
		}
#ifndef CHIP_AU8810
		for (i = 0; i < NR_WT; i++) {
			if (vortex->dma_wt[i].fifo_status == FIFO_START) {
				if (vortex_wtdma_bufshift(vortex, i)) ;
				spin_unlock(&vortex->lock);
				snd_pcm_period_elapsed(vortex->dma_wt[i].
						       substream);
				spin_lock(&vortex->lock);
			}
		}
#endif
		spin_unlock(&vortex->lock);
		handled = 1;
	}

----------------------------------------------------------------------
 alien999999999 - 01-04-06 22:08 
----------------------------------------------------------------------
raymond, when will all these au88x0 changes (also from the mailinglist) be
put into CVS?

I had to modify the CVS of yesterday quite a bit so i wouldn't have a hung
au8820 module

Issue History
Date Modified  Username       Field                    Change              
======================================================================
04-12-05 20:43 alien999999999 New Issue                                    
04-12-05 20:43 alien999999999 Distribution              => Mandrake        
04-12-05 20:43 alien999999999 Kernel Version            => 2.6.7           
04-12-05 20:48 alien999999999 Note Added: 0004461                          
04-12-05 20:49 alien999999999 File Added: au88x0.c                         
04-12-05 20:49 alien999999999 File Added: au88x0.h                         
04-12-05 20:50 alien999999999 File Added: au88x0_core.c                    
04-12-05 20:50 alien999999999 File Added: au88x0_mixer.c                    
04-12-05 20:51 alien999999999 Note Added: 0004462                          
08-24-05 11:13 Raymond        Note Added: 0005928                          
10-27-05 02:27 Raymond        Note Added: 0006564                          
01-03-06 04:04 Raymond        Note Added: 0007397                          
01-04-06 22:08 alien999999999 Note Added: 0007455                          
======================================================================




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