Sorry if I'm posting this question in the wrong list. I've been trying to search for this issue, but have been unsuccessful so far with not even a hint at what I could try to get to the bottom of this. I'm not very familiar with the sound system. The symptom: regular hiccup in the sound output. What I've found: launching the pulseaudio daemon with -v showed that it is constantly changing the port of the sync: I: [pulseaudio] sink.c: Changed port of sink 1 "alsa_output.pci-0000_00_1b.0.analog-stereo" to analog-output I: [pulseaudio] module-device-restore.c: Restoring volume for sink alsa_output.pci-0000_00_1b.0.analog-stereo. I: [pulseaudio] module-device-restore.c: Restoring mute state for sink alsa_output.pci-0000_00_1b.0.analog-stereo. I: [alsa-sink] alsa-sink.c: Successfully enabled synchronous volume. I: [alsa-sink] alsa-sink.c: Hardware volume ranges from -179.00 dB to 0.00 dB. I: [alsa-sink] alsa-sink.c: Fixing base volume to 0.00 dB I: [alsa-sink] alsa-sink.c: Using hardware volume control. Hardware dB scale supported. I: [alsa-sink] alsa-sink.c: Using hardware mute control. I: [pulseaudio] sink.c: Changed port of sink 1 "alsa_output.pci-0000_00_1b.0.analog-stereo" to analog-output-headphones I: [pulseaudio] module-device-restore.c: Restoring volume for sink alsa_output.pci-0000_00_1b.0.analog-stereo. I: [pulseaudio] module-device-restore.c: Restoring mute state for sink alsa_output.pci-0000_00_1b.0.analog-stereo. I: [alsa-sink] alsa-sink.c: Successfully enabled synchronous volume. I: [alsa-sink] alsa-sink.c: Hardware volume ranges from -179.00 dB to 0.00 dB. I: [alsa-sink] alsa-sink.c: Fixing base volume to 0.00 dB I: [alsa-sink] alsa-sink.c: Using hardware volume control. Hardware dB scale supported. I: [alsa-sink] alsa-sink.c: Using hardware mute control. I noticed this also reflected in the "sound settings", and the port changes coincide with the hiccups. This is on up-to-date Ubuntu 11.10, where I believe the pulseaudio version 1.0. The underlying hardware is Intel HD audio that is integrated on the Z68 motherboard. I'd greatly appreciate any suggestions as how I could get to the bottom of this issue? Maybe it's not pulseaudio's fault, but I don't know what configures these ports. cheers, -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20111201/c8fa1be7/attachment.html>