Hello,

I don't know if I am in the right place to expose my problem, if not, excuse me.

I have a problem with snd_pcm_open function. The program seems to be blocked and gdb output shows this is happening while using snd_pcm_open. I am upgrading a program that reads videos so as to use alsa now. On my computer, there is no problem. But the problem appears on test computer.

My questions are :

- is it only a configuration problem (.asoundrc) ? - if not, what else could it be ?

_rc = snd_pcm_open(&_handle, "defaultTEST", SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK); <= this is line *42 in ../../src/CAudio.cpp* in gdb output

This a part of gdb when the progam is blocked :

*0x009877a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2 (gdb) bt #0 0x009877a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2 #1 0x00bdbd4b in __open_nocancel () from /lib/tls/libpthread.so.0 #2 0xf6fedb9d in open () from /usr/lib/libesddsp.so.0 #3 0x04e7e5f2 in snd_pcm_hw_open () from /lib/libasound.so.2 #4 0x04e7ea90 in _snd_pcm_hw_open () from /lib/libasound.so.2 #5 0x04e70893 in snd_pcm_close () from /lib/libasound.so.2 #6 0x04e70e78 in snd_pcm_close () from /lib/libasound.so.2 #7 0x04e710c9 in snd_pcm_open_slave () from /lib/libasound.so.2 #8 0x04ea4541 in snd_pcm_dmix_open () from /lib/libasound.so.2 #9 0x04ea4aea in _snd_pcm_dmix_open () from /lib/libasound.so.2 #10 0x04e70893 in snd_pcm_close () from /lib/libasound.so.2 #11 0x04e70e78 in snd_pcm_close () from /lib/libasound.so.2 #12 0x04e710c9 in snd_pcm_open_slave () from /lib/libasound.so.2 #13 0x04ea8186 in _snd_pcm_asym_open () from /lib/libasound.so.2 #14 0x04e70893 in snd_pcm_close () from /lib/libasound.so.2 #15 0x04e70e78 in snd_pcm_close () from /lib/libasound.so.2 #16 0x04e710c9 in snd_pcm_open_slave () from /lib/libasound.so.2 #17 0x04e8e1de in _snd_pcm_plug_open () from /lib/libasound.so.2 #18 0x04e70893 in snd_pcm_close () from /lib/libasound.so.2 #19 0x04e70e78 in snd_pcm_close () from /lib/libasound.so.2 #20 0x08065543 in CAudio::openDevice (this=0x87795e0, sampleRate=@0x8884558https://messagerie.si.c-s.fr/horde/imp/message.php?index=988#, nbChannels=@0x888455chttps://messagerie.si.c-s.fr/horde/imp/message.php?index=988#, devicename=@0xfeee8670https://messagerie.si.c-s.fr/horde/imp/message.php?index=988#) at ../../src/CAudio.cpp:42*

.asoundrc I am using :

*pcm.card0 { type hw card 0 device 0 }

pcm.card1 { type hw card 1 device 0 }

pcm.dmixerDEF { type dmix ipc_key 1025 slave { pcm card0 period_time 0 period_size 2048 buffer_size 32768 rate 44100 } bindings { 0 0 1 1 } }

pcm.dmixerTEST { type dmix ipc_key 1027 slave { pcm card1 format S16_LE period_time 0 period_size 2048 buffer_size 32768 rate 44100 } #bindings { # 0 0 # 1 1 #} }

pcm.DEF { type asym

playback.pcm "dmixerDEF" capture.pcm "card0" }

pcm.TEST { type asym

playback.pcm "dmixerTEST" capture.pcm "card1" }

pcm.!default { type plug slave.pcm "DEF" }

pcm.defaultTEST { type plug slave.pcm "TEST" }*

Nicolas Krieger