I solved it: I did sudo apt-get update && sudo apt-get upgrade -y then restarted - and sound is now playing again! But now the sound notification icon is missing. I just did a sudo apt-get install indicator-sound and after a restart everything was back to working again.

Recently, I have answered a few questions that were upvoted by factors more than the accepted answer, but not accepted. This one, at the time of my writing, has an accepted answer that the asker said was not what he wanted. I don't know why. In the future, when people view this, people might only...

Once again, Sparkles the /unicorn seems to have gotten herself in a whole heap of trouble. This time she appears to have been kidnapped! oh where, oh where has my unicorn gone? oh where oh where can she be? Can you help to track her down? Do you have what it takes to join the ranks of the Defen...