I have 3 accounts on my PC (besides root). Whenever I logged in one of them and switched on another, the second account does not have sound. The KMixer icon in tray is red crossed and config says that there is no mixer available. I have added all 3 users and root in Audio Group, but it does not solve a thing.

This thing is really annoying because any time the PC is performing some long task on my account (so I cannot log out) and my wife wants to do anything with music on her account, she is not able to do it.

Any way to have sound on all logged in accounts or it is not possible at all in Linux (which I still refuse to believe!).