[Bug 16463] New: ALSA has to be "jump started" by another app when using a Terratec Dmx 6fire card (ice1712 driver)

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=16463

           Summary: ALSA has to be "jump started" by another app when using
                    a Terratec Dmx 6fire card (ice1712 driver)
           Product: Wine
           Version: CVS/GIT
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: winmm&mci
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: robert.broglia at gmail.com


When using this multi-channel sound card on wine, it doesn't work unless
another app has already opened it and made dmix active (or dsnoop for input).
I'm using ALSA 1.0.18 with the default out-of-box configuration on Gentoo (no
.asoundrc file).

The problem lies in wine's ALSA_TestDeviceForWine function because it tries to
open the card using hw:[card],[device] and eventually fails on
snd_pcm_hw_params_set_channels(pcm, hwparams, 2) because the card can't be set
to only 2 channels when using the hardware device directly. When the card has
already been opened by another program via "plughw" or "default", opening the
card using "hw" seems to redirect to "plughw" automatically and wine succeeds
in setting 2 channels.

I tried changing ALSA_TestDeviceForWine to use plughw:[card],[device] and all
playback/recording worked perfectly without needing another app to previously
open dmix/dsnoop. Is there some reason this isn't the default behaviour or
there isn't a registry option for it? I would assume other cards that can't be
set to 2 channels in hardware are affected as well.


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