after I typed the killall pulseaudio then my ubuntu has frozen and I need to restart the pc. After restarting the sound was back.
NOTE: I work on LiveCD -- Waiting sound system to respond https://bugs.launchpad.net/bugs/553057 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs