[alsa-devel] Audinst HUD-mx2 covertly muting itself

Clemens Ladisch clemens at ladisch.de
Thu Oct 31 17:25:42 CET 2013

Tobias Klausmann wrote:
> I have gotten a temporary workaround: use the secondary PCM
> device (hw:0,1) instead of the primary (hw:0,0)

Oops, I didn't notice that there are two devices.

The first PCM device is only for Dolby-encoded data, so muting the
analog output would be correct.

> Maybe something along the lines of PCI device "quirks" would be
> the right thing to do? I.e. swapping the two PCM devices from
> ALSA's point of view.

The driver should never make the non-PCM device the first one.


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