[Bug 34183] New: alsa driver ignores output device selection

http://bugs.winehq.org/show_bug.cgi?id=34183

Bug #: 34183
           Summary: alsa driver ignores output device selection
           Product: Wine
           Version: 1.6
          Platform: x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: winealsa.drv
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

Created attachment 45471
  --> http://bugs.winehq.org/attachment.cgi?id=45471
My ~/.asoundrc setup

I own a soundcard (emu20k2) that alsa does hxmix with (no dmix involved). I
don't run pulseaudio.

I use a 4.0 (Front l/r, back l/r) set of speakers and I like front input to be
duplicated on the back, and to achieve that I use the attached .asoundrc, with
a pcm.ch40dup device that does just this.

Now, with ogg123 I'd do:
ogg123 -d alsa -o dev:ch40dup stereosong.ogg

And it'd play through the 4 speakers.

Now, I tried to get it to work with winealsa.drv:

1. It doesn't enumerate it, so I can't select it as output through the winecfg
panel. Workaround: I can force winealsa.drv to be aware of it through the
ALSAOutputDevices registry key (I put just "ch40dup" there) as described in
http://wiki.winehq.org/UsefulRegistryKeys

2. I select it as output and voice output on winecfg. Click test. The test
sound only plays through the front speakers, so it's failing to really use that
output and failing back to "default"... silently, without any output indicating
any problem on the terminal it was launched from.

3. Afterwards, I try foobar2000. Audio still outputs from front only.
Conveniently, foobar2000 does support selecting an output device. ch40dup is
listed. If I try to force playing through it, foobar2000 crashes. Stack trace
of its own builtin crash report tool reports the crash happens inside dsound.