[mythtv] A weird problem with ALSA, X11, DirectFB

[jpahka at welho.com]

Lainaus "Michael T. Dean" <mtdean at thirdcontact.com>:
> >So, the thing is, I can hear the audio throuh my external amplifier when
> I'm
> >running mythfrontend in X11 (a vnc desktop, that's why it doesn't find Xv
> >support), but I get a 'Unable to set sw params for playback: Invalid
> argument'
> >when I'm running mythfrontend with QT/E+DirectFB setup.
> >  
> ...
> 
> >Mythfrontend in QT/E + DirectFB:
> ...
> 
> >2005-06-08 17:31:18.224 Opening audio device 'spdif'.
> >2005-06-08 17:31:18.302 Unable to set sw params for playback: Invalid
> argument
> >2005-06-08 17:31:18.302 Unable to set ALSA parameters
> >
> It looks like you're watching a channel on the X11 version that sends a 
> 48kHz PCM audio signal (or AC3) and one on the QT/E version that sends a 
> 44.1kHz (or 32kHz) PCM audio signal.  
> 
> ...
> 
> Take a look at 
>
http://mythtv.info/moin.cgi/DigitalSoundHowTo#head-b318f22131b4a59eef5f28edfac9160204e13719
> 
> and try using either the "ALSA:digital" or "ALSA:mixed-digital"  devices 
> (and use either "default" or "ALSA:default" for the mixer device).  You 
> may have to adjust the device numbers for your sound card (as described 
> in the page).

Hi Mike and thanks for your answer,

But unfortunately that is not the case here. I'm using the same channel on both
occations (and that channel sends audio @ 48kHz). And the same channel worked
also on 0.16 in qt/e setup.

I did try the alsa settings found on the page you suggested, but they didn't
make any difference, X11 still works and qt/e + dfb doesn't. It's weird to say
the least.

Do you have any ideas on how to debug the situation further?

Thanks in advance, 

juhis