22.05.2016 02:03, Alexander E. Patrakov wrote: > If a card has been hot-plugged after pulseaudio start, alsa-lib still has > old configuration in memory, which doesn't have PCM definitions for the > new card. Thus, this error appears, and the device doesn't work: > > I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.front.0:CARD=0' > I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory > I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory > I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM front:0 > I: [pulseaudio] alsa-util.c: Error opening PCM device front:0: No such file or directory > > The snd_config_update_free_global() function makes alsa-lib forget any > cached configuration and reparse all PCM definitions from scratch next > time it is told to open anything. > > The trick has been copied from Phonon. > > Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=54029 > Signed-off-by: Alexander E. Patrakov <patrakov at gmail.com> Obviously, the proposed patch is invalid if PulseAudio calls snd_something_open() from more than one thread. I don't know if this is the case. -- Alexander E. Patrakov
