[alsa-devel] Hotplug plugin
erik at slagter.name
Tue Jan 1 19:26:13 CET 2008
Lennart Poettering wrote:
>> - pulseaudio, using hal-detection and "combined" device: doesn't work
>> because a removed device is never reinserted into the combined
> Of course it is. Just install PA 0.9.7 or newer.
The relevant config file sections (using pa 0.9.7):
load-module module-combine sink_name=all
-> adjust_time=5 resample_method=src-sinc-best-quality
- or -
load-module module-combine sink_name=all master=alsa_output.hw_0
-> slaves=alsa_output.hw_1 adjust_time=10
- or -
load-module module-alsa-sink device=hw:0 format=s16 rate=44100
-> channels=2 sink_name=alc883 channel_map=left,right
load-module module-alsa-sink device=hw:1 format=s16 rate=44100
-> channels=2 sink_name=jvc channel_map=left,right
load-module module-combine sink_name=all master=alc883 slaves=jvc
-> adjust_time=10 resample_method=src-sinc-best-quality
-> is line continuation
These combinations all yield the same result: at startup I have an "all"
sink that combines both devices, and does that pretty well, I must say.
But as soon as the USB device is removed, it is removed from the
combined "all" sink. Then when the USB device is reinserted, it gets
detected (module-hal-detect) or not (module-detect, static config).
Using module-hal-detect the reinserted just sits there, it isn't added
to the combined sink. Using the other methods, it's not even detected
that the USB device is back...
The only solution I can think of, is a udev script that casts some magic
spells towards pulse when the USB device is inserted or removed... But
then I could skip pulse altogether, because mpd has an option to
activate and deactivate selected outputs at runtime, as well.
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