According to the HAL spec, ALSA devices should have an 'alsa.device_pcm_class' property. But they don't: $ lshal | grep pcm_class alsa.pcm_class = 'modem' (string) alsa.pcm_class = 'modem' (string) alsa.pcm_class = 'generic' (string) alsa.pcm_class = 'generic' (string) alsa.pcm_class = 'generic' (string)
Fixed the spec with commit 08b9051f24809f0214a39faad8d2e154d93b5705
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