Skype users may read http://pulseaudio.org/wiki/PerfectSetup#Skype
** Summary changed: - PulseAudio prevents programs relying on ALSA to work correctly + Default ALSA device must use PulseAudio, otherwise ALSA applications may fail ** Description changed: - Binary package hint: pulseaudio + Steps to reproduce: - On latest Hardy amd64 running on Lenovo N100 laptop with Intel HDA sound - card sound does work through PulseAudio, but programs relying on ALSA - don't work properly. + Run both of these at the same time: + gst-launch-0.10 audiotestsrc ! pulsesink + gst-launch-0.10 audiotestsrc ! alsasink - For example, aplay always reports that alsa device is busy. VLC doesn't - produce any sound. So does Twinkle as well. + If your default sound device does not support hardware mixing, the + second command will fail. ALSA cannot use the device while PulseAudio is + using it, and this affects a lot of applications. - Creating /etc/asound.conf as suggested in - https://wiki.ubuntu.com/PulseAudio (this file is not created by default) - doesn't help too much. In this case, aplay works as intended. VLC - produces sound, too, but on attempt to stop playing PulseAudio hangs - completely. Skype doesn't produce any sound. Twinkle produces no sound - output, though microphone works correctly. + Note that if you run the commands the other way around, alsalib will use + dmix, and then so will pulseaudio, so there is not as much of a problem + this way around (except for the fact that dmix and PA are doing the same + job, and you can not control the ALSA-using apps' volumes and routing + with PA.) + + + Resolution: + + Follow http://pulseaudio.org/wiki/PerfectSetup#ALSAApplications + i.e. install /etc/asound.conf with: + + pcm.pulse { + type pulse + } + ctl.pulse { + type pulse + } + pcm.!default { + type pulse + } + ctl.!default { + type pulse + } + + Note, too, that there are some applications that fail with ALSA->Pulse, + in particular, SDL seems to hang with Neverball. These bugs can be + addressed seperately in due course. -- Default ALSA device must use PulseAudio, otherwise ALSA applications may fail https://bugs.launchpad.net/bugs/198453 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
