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

bugtrack
2006-06-26T00:46:04Z

Last Modified: 06-26-2006 02:46 CEST
======================================================================
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 - 06-25-06 07:04
----------------------------------------------------------------------
>> 1. ALSA has hardware mixing if the chipset/driver supports it (i know
mine
>> does).

>> 2. OSS does not do any multiple sounds

>> so, the OSS application is continually using soundcard. and aplay plays
a
>> short one... should it work or must aplay be denied???

The au88xx driver in sourceforge also allow two or more instances of
"mplayer -ao oss" or "play" running.

For ALSA au88x0 driver, it depends on the application,

By reducing the number of subdevice of au88x0 device 0 to 2 and have 2
stereo PCM running. (i.e. no available subdevice )

aplay *.wav
aplay: main:548: audio open error: Device or resource busy

mplayer -ao alsa=device=hw=0,0 *.wav
alsa-init: using device hw:0
alsa-lib: pcm_hw.c:1248:(snd_pcm_hw_open) open /dev/snd/pcmC0D0p failed:
Device or resource busy
alsa-init: playback open error: Device or resource busy
Could not open/initialize audio device -> no sound.
Audio: no sound
Video: no video

Exiting... (End of file)

mplayer -ao oss *.wav

[AO OSS] audio_setup: Can't open audio device /dev/dsp: Device or resource
busy
alsa-init: using device default
alsa-lib: pcm_hw.c:1248:(snd_pcm_hw_open) open /dev/snd/pcmC0D0p failed:
Device or resource busy
alsa-init: playback open error: Device or resource busy
[AO ARTS] can't connect to aRts soundserver
[AO ESD] esd_open_sound failed: Connection reset by peer
[JACK] cannot open server
[AO SDL] Samplerate: 44100Hz Channels: Stereo Format s16le
warning: leaving MCOP Dispatcher and still 143 types alive.
[AO SDL] Unable to open audio: No available audio device
open /dev/[sound/]dsp: Device or resource busy
[OpenAL] could not open device
AO: [null] 44100Hz 2ch s16le (2 bytes per sample)

----------------------------------------------------------------------
Raymond - 06-26-06 02:46
----------------------------------------------------------------------
>>I don't know if this is true on any driver, but here's what happend
yesterday:
>> (i have au8810 driver; on x86_64 system)

>> i was watching google video on my system

>> (google video is a flash thing; thus emulated and uses OSS (the only
app that
>> needs it)) and suddenly gaim reconnected a network and beeped using
aplay
>> (ALSA) as a result, the sound was played, all sound looped (also
flash), and a
>> few hours later, my /var/log/kernel/warnings was > 600MB (kernel
warnings).

It seem that you only send the kernel warning to rlrevell.

flash open playback/capture stream and use up 4 SRC, do gaim also open
capture stream ?

For ALSA au88x0 driver, it is possible to run two or more instances of
"arecord" or "record" concurrently

Most of the ALSA drivers don't support this, (This is why dsnoop is not
needed for au88x0)
Do OSS emulation official support this feature ?

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
01-05-06 07:21 Raymond Note Added: 0007462
01-05-06 20:32 shurick Issue Monitored: shurick
01-06-06 17:17 alien999999999 Note Added: 0007488
01-06-06 17:33 alien999999999 File Added: alsa-cvs-2006-01-04.patch

01-13-06 13:51 Raymond Note Added: 0007639
01-13-06 18:18 tiwai Note Added: 0007648
01-14-06 04:53 Raymond Note Added: 0007653
01-14-06 05:00 Raymond Note Edited: 0007653
01-17-06 12:27 Raymond Note Added: 0007697
01-18-06 15:51 Raymond Note Added: 0007710
01-18-06 15:52 Raymond File Added: au88x0_codec.patch
01-19-06 13:51 Raymond Note Added: 0007719
02-05-06 05:20 Raymond Note Edited: 0007710
02-05-06 05:28 Raymond Note Added: 0007930
02-13-06 16:38 Raymond Note Deleted: 0006564
02-13-06 16:41 Raymond Note Added: 0008054
03-01-06 07:39 Raymond Note Added: 0008273
03-18-06 12:28 Raymond Note Deleted: 0008273
03-20-06 17:54 Raymond File Added: au88x0_conf.patch
03-21-06 02:02 Raymond Note Added: 0008734
03-21-06 18:01 tiwai Note Added: 0008754
03-22-06 02:05 Raymond File Added: au88x0_mpu401.patch

03-22-06 02:28 Raymond Note Added: 0008779
03-22-06 02:31 Raymond Note Edited: 0008779
03-22-06 02:38 rlrevell Note Added: 0008782
03-22-06 04:00 Raymond Note Added: 0008836
03-22-06 04:09 rlrevell Note Added: 0008839
03-26-06 09:55 Raymond Note Added: 0008967
03-29-06 17:48 Raymond Note Added: 0008995
03-31-06 06:52 Raymond Note Edited: 0008995
04-02-06 07:01 Raymond Note Edited: 0008995
04-10-06 16:07 Raymond Note Added: 0009190
04-10-06 16:39 tiwai Note Added: 0009192
04-10-06 16:43 Raymond Note Added: 0009194
04-10-06 16:45 tiwai Note Added: 0009195
04-10-06 19:01 Raymond Note Added: 0009215
04-10-06 19:04 Raymond Note Edited: 0009215
04-10-06 19:05 tiwai Note Added: 0009216
04-11-06 18:36 Raymond Note Added: 0009234
04-11-06 18:54 tiwai Note Added: 0009235
06-25-06 07:04 Raymond Note Added: 0010502
06-26-06 02:46 Raymond Note Added: 0010522
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