[mythtv-users] ALSA problem FC2

Stephen Tait tait at digitallaw.co.uk
Mon Jun 28 06:38:53 EDT 2004

At 03:21 28/06/2004 -0700, you wrote:
>Axel Thimm posted his Fedora Core 2 upgrades. Time to
>give FC2 another try? Well, maybe not, I am stalled
>with ALSA using emu10k1 and KDE: no sound.
>"/dev/dsp can't be opened"
>As this note shows--->
>this happens with a number of sound cards, not just
>Creative Labs. The sound card is fine, plays with FC1
>and is detected under FC2 (lspci). However, even when
>I make the suggested changes to modprobe.conf, yes
>modified for either emu10k1 or emu10k1x, it fails with
>the message quoted above. Is there a solution?
>Thanks in advance for any help.

I'm no RH/FC expert, but /dev/dsp is an OSS device, not an ALSA device. If 
you do go the ALSA route, you'll need to enable ALSA-OSS emulation in your 
kernel (assuming you're using 2.6); or you could just not use OSS at all - 
if all you're using is MythTV, mPlayer and/or Xine, you can do very well 
without emulation, as these apps all support ALSA natively.

If you can convince KDE to not try and open /dev/dsp (disable aRTS perhaps? 
Or switch it over to ALSA only? Again, I'm not a KDE buff either ;^) then 
you should be fine... you've got an emu10k1 card, so you don't have any 
real need for a software mixer like aRTS.

Check your mixer setting... fire up alsamixer in a terminal window and 
check none of your channels are muted (there'll be a MM at the top if it 
is; hit "m" to unmute it).

Can you get aplay to work (part of the alsa-utils)? It's a command line 
thingy for playing sound... try "aplay /path/to/some/sound/file.wav"

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