Banshee, xmms and others don't play music

I cannot reproduce your problem with 0.10.12-1ubuntu1 on Edgy.

What's the output of ls -l /dev/dsp ?
Start banshee from terminal and post the output of this error/warning message.

Does other audio players like totem or rhythmbox play same content without problems?

Totem plays fine - I don't have a /dev/dsp - just a /dev/dsp1

Do you still have this with 0.11.0-0ubuntu1 on edgy?
Does "gst-launch-0.10 playbin uri=file:///path/to/file" play something for you? Is rhythmbox working?

Still have it. The command gives me

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock

But doesn't play any sound...

Ok, what about
gst-launch-0.10 filesrc location=/path/to/file ! decodebin ! audioconvert ! audioresample ! alsasink
and
gst-launch-0.10 filesrc location=/path/to/file ! decodebin ! audioconvert ! audioresample ! osssink

Gives me:

Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
ERROR: from element /pipeline0/alsasink0: Could not open resource for writing.
Additional debug info:
gstalsasink.c(640): gst_alsasink_open (): /pipeline0/alsasink0:
Playback open error on device 'default': No such device
Setting pipeline to NULL ...
FREEING pipeline ...

and

Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
ERROR: from element /pipeline0/osssink0: Could not open resource for writing.
Additional debug info:
gstosssink.c(376): gst_oss_sink_open (): /pipeline0/osssink0:
system error: No such file or directory
Setting pipeline to NULL ...
FREEING pipeline ...

Interesting... what are you using to play stuff in totem then?
If you run gstreamer-properties what is selected for audio output?

I use totem-xine. Mainly because almost in every release one finds a problem with gstreamer and xine is far more stable than gstreamer is (IJW).
The output is set to Autodetect...

BTW: I don't get any sound from gstreamer - not on login, not in banshee, xmms (at least the latter uses /dev/dsp) - the only one working is xine.

What output plugin did you select in xine?

It seems this is more a hardware or driver problem as you should have /dev/dsp in any case...

What's the output of
asoundconf list

?

No reply, bug closed. Feel free to reopen with the asked informations if you still get that problem