Try to test the new xubuntu 11.04 with kde on a multi-user system. The first user (for example user1) can log in and gets a default sink from pulse. The second user(for example user2) that will log in gets a auto_null because pulse did not found any sinks. If i log out user1, than user2 can get a default sink by kill and start pulse. Where should be the reason? gd
