It is extremely interesting that the buffer is so large on Lucid. When the buffer is 33791 and the playback is 44100 this causes nearly a second delay between audio being buffered and being played. With a 1048576 buffer that will be 23 seconds.
Also, while the underrunning may well be hardware dependent, PulseAudio closing and reopening the audio sink when a buffer underrun happens is not, and means that a program such as the example I posted can do a denial of service attack on Pulse just by intentionally underrunning the buffer repeatedly - which causes Pulse to eat 100% CPU opening and closing the sink. -- PulseAudio ALSA plugin opens and closes the PulseAudio sink several times per second for no reason https://bugs.launchpad.net/bugs/503174 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
