I've got sound problem on my redhat 8.0. I can detect the on board sound card but cannot here the sound. I ran the "sndconfig" and when it played the sample sound, it displayed the following error message.
Unable to play Audio
The following error occured playing the sample:
SOX: Can't open output file '/dev/dsp': Device or resource busy.
What should I do next and how to solve the problem?