The main reason I upgraded my Myth boxes was so that I could use Boxee. I first tested it out on my main computer running Kubuntu 10.04 and everything worked pretty well. I expected the to Myth boxes running Xubuntu 10.04 would work just as well. Of course nothing is that easy, I log into Boxee and try to play something from my queue, no sound. I try something else, no sound. The third time was not the charm, so I tried the other Myth box and found the same problem.
I jumped onto Google and had to do a bit of searching before I found this post in the Boxee forums. The culprit seems to be … wait for it … pulseaudio. That would definitely explain why it worked on Kubuntu. Anyway the crux of the fix is as follows:
sudo apt-get remove pulseaudio
sudo apt-get install esound
sudo killall pulseaudio
sudo restart gdm
In the original post he killed pulseaudio before he removed it, but I found that it would just pop up again in a few seconds. Also he said to restart the computer but I found that just restarting X was enough.