forwarded 549531 alsa-devel@xxxxxxxxxxxxxxxx thanks This looks more like a general problem and shouldn't be solved distribution specific so request for help to the alsa developers. Elimar * John Lindgren [091003 20:34 -0400] > Package: libasound2 > Version: 1.0.21a-1 > Severity: normal > Tags: patch > > Symptoms > -------- > > This bug first showed up because of a new ALSA output plugin for > Audacious audio player: > > http://jira.atheme.org/browse/AUDPLUG-77#action_10640 > > Essentially, any call to snd_device_name_hint() causes later calls to > snd_pcm_open() to fail with messages like these: > > ALSA lib conf.c:4600:(snd_config_expand) Unknown parameters CARD=Live,DEV=0 > ALSA lib pcm.c:2211:(snd_pcm_open_noupdate) Unknown PCM rear:CARD=Live,DEV=0 > > This happens only for PCMs defined in ALSA config files (such as the > ones under /usr/share/alsa/cards), not for "default" or "hw:0,0"-style. > It does not seem to depend on a particular sound card. It can be > reproduced without Audacious by adding a call to pcm_list() before the > call to snd_pcm_open() in aplay.c from the alsa-utils package: > > $ ./aplay -D front:CARD=ICH6,DEV=0 Test.wav > default:CARD=ICH6 > Intel ICH6, Intel ICH6 > Default Audio Device > front:CARD=ICH6,DEV=0 > Intel ICH6, Intel ICH6 > Front speakers > surround40:CARD=ICH6,DEV=0 > Intel ICH6, Intel ICH6 > 4.0 Surround output to Front and Rear speakers > surround41:CARD=ICH6,DEV=0 > Intel ICH6, Intel ICH6 > 4.1 Surround output to Front, Rear and Subwoofer speakers > surround50:CARD=ICH6,DEV=0 > Intel ICH6, Intel ICH6 > 5.0 Surround output to Front, Center and Rear speakers > surround51:CARD=ICH6,DEV=0 > Intel ICH6, Intel ICH6 > 5.1 Surround output to Front, Center, Rear and Subwoofer speakers > iec958:CARD=ICH6,DEV=0 > Intel ICH6, Intel ICH6 - IEC958 > IEC958 (S/PDIF) Digital Audio Output > null > Discard all samples (playback) or generate zero samples (capture) > ALSA lib conf.c:4600:(snd_config_expand) Unknown parameters CARD=ICH6,DEV=0 > ALSA lib pcm.c:2211:(snd_pcm_open_noupdate) Unknown PCM front:CARD=ICH6,DEV=0 > aplay: main:610: audio open error: Invalid argument > > Diagnosis > --------- > > try_config(), called by snd_device_name_hint(), calls > snd_config_search_definition() at namehint.c line 243 and > snd_config_search_alias_hooks() at line 339, then calls > snd_config_delete() on the returned nodes at lines 331 and 383. This > was probably meant to prevent leaking memory returned by the search > functions, but in fact it removes information from the config that is > needed by later calls, such as snd_pcm_open. Hence, snd_pcm_open > behaves as though devices like "front" and "rear" do not exist. > > I have attached a patch for aplay.c to reproduce the problem and a patch > for namehint.c to fix it. One side effect of the fix (on my system at > least) is that two "null" devices are now listed by "aplay -L" and in > Audacious. > > Peace, > John Lindgren > > > -- System Information: > Debian Release: squeeze/sid > APT prefers testing > APT policy: (500, 'testing') > Architecture: i386 (i686) > > Kernel: Linux 2.6.30-1-686 (SMP w/1 CPU core) > Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/dash > > Versions of packages libasound2 depends on: > ii libc6 2.9-25 GNU C Library: Shared libraries > > libasound2 recommends no packages. > > Versions of packages libasound2 suggests: > pn libasound2-plugins <none> (no description available) > > -- no debconf information > --- aplay.0.c 2009-08-31 11:13:36.000000000 -0400 > +++ aplay.c 2009-10-03 19:54:43.000000000 -0400 > @@ -603,6 +603,8 @@ > goto __end; > } > > + pcm_list(); > + > err = snd_pcm_open(&handle, pcm_name, stream, open_mode); > if (err < 0) { > error(_("audio open error: %s"), snd_strerror(err)); > --- namehint.0.c 2009-09-09 08:34:54.000000000 -0400 > +++ namehint.c 2009-10-03 17:39:23.000000000 -0400 > @@ -328,7 +328,6 @@ > if (snd_config_search(cfg1, "slave", &cfg) >= 0 && > snd_config_search(cfg, base, &cfg1) >= 0) > goto __hint; > - snd_config_delete(res); > res = NULL; > if (strchr(buf, ':') != NULL) > goto __ok; > @@ -379,8 +378,6 @@ > err = hint_list_add(list, buf, buf1); > } > __skip_add: > - if (res) > - snd_config_delete(res); > if (buf1) > free(buf1); > free(buf); > _______________________________________________ > Pkg-alsa-devel mailing list > Pkg-alsa-devel@xxxxxxxxxxxxxxxxxxxxxxx > http://lists.alioth.debian.org/mailman/listinfo/pkg-alsa-devel -- It's a good thing we don't get all the government we pay for. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
