The problem is related to PulseAudio. When I remove it, the sound is OK. In volume control applet and paman, this problem looks like Flightgear keeps disconnecting and reconnecting to sound server.
-- Flightgear uses all CPU available, corrupted sound https://bugs.launchpad.net/bugs/450245 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