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when i try to open up an mp3 file with my player i get this error on occasion.

Code:

Totem could not play '(.mp3 file name)'.

Reason: This is an audio-only file, and there is no audio output available.

then one time it told me to run 'esd' at command line so i did and i got this error

Code:

/dev/dsp: Device or resource busy

what do these mean?

This only seems to happen after my computer has gone to "sleep" other than that it usually works. What can i do to fix this?

Thanks