Sorry for the late reply, email was not available to me yesterday. Here is the -vvvv output of the periodic messages: D: [pulseaudio] alsa-jack-inputdev.c: jack_report: name HDA Intel PCH Headphone event type 5 code 2 value 1 D: [pulseaudio] device-port.c: Setting port analog-output-headphones to status yes D: [pulseaudio] module-switch-on-port-available.c: finding port analog-output-headphones D: [alsa-sink] alsa-mixer.c: Activating path analog-output-headphones D: [alsa-sink] alsa-mixer.c: Path analog-output-headphones (Analog Headphones), direction=1, priority=90, probed=yes, supported=yes, has_mute=yes, has_volume=yes, has_dB=yes, min_volume=0, max_volume=64, min_dB=-179, max_dB=0 D: [alsa-sink] alsa-mixer.c: Element Master, direction=1, switch=1, volume=1, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x7ffffffffffff, n_channels=1, override_map=yes D: [alsa-sink] alsa-mixer.c: Element Headphone, direction=1, switch=1, volume=1, volume_limit=-1, enumeration=0, required=4, required_any=0, required_absent=0, mask=0x3600000000f66, n_channels=2, override_map=yes D: [alsa-sink] alsa-mixer.c: Element Front, direction=1, switch=1, volume=3, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x6, n_channels=2, override_map=no D: [alsa-sink] alsa-mixer.c: Element Surround, direction=1, switch=2, volume=2, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x6, n_channels=2, override_map=no D: [alsa-sink] alsa-mixer.c: Element Center, direction=1, switch=2, volume=2, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x7ffffffffffff, n_channels=1, override_map=no D: [alsa-sink] alsa-mixer.c: Element LFE, direction=1, switch=2, volume=2, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x7ffffffffffff, n_channels=1, override_map=no D: [alsa-sink] alsa-mixer.c: Element PCM, direction=1, switch=0, volume=1, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x3600000000f66, n_channels=2, override_map=yes 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. D: [alsa-sink] alsa-sink.c: Requested volume: 0: 100% 1: 100% D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB D: [alsa-sink] alsa-sink.c: Got hardware volume: 0: 100% 1: 100% D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB D: [alsa-sink] alsa-sink.c: Calculated software volume: 0: 100% 1: 100% (accurate-enough=yes) D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB I: [pulseaudio] sink.c: Changed port of sink 1 "alsa_output.pci-0000_00_1b.0.analog-stereo" to analog-output-headphones D: [alsa-sink] alsa-sink.c: Read hardware volume: 0: 100% 1: 100% D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB I: [pulseaudio] module-device-restore.c: Restoring volume for sink alsa_output.pci-0000_00_1b.0.analog-stereo. D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event. D: [alsa-sink] alsa-sink.c: Requested volume: 0: 91% 1: 91% D: [alsa-sink] alsa-sink.c: in dB: 0: -2.54 dB 1: -2.54 dB D: [alsa-sink] alsa-sink.c: Got hardware volume: 0: 91% 1: 91% D: [alsa-sink] alsa-sink.c: in dB: 0: -2.40 dB 1: -2.40 dB D: [alsa-sink] alsa-sink.c: Calculated software volume: 0: 99% 1: 99% (accurate-enough=yes) D: [alsa-sink] alsa-sink.c: in dB: 0: -0.14 dB 1: -0.14 dB D: [alsa-sink] sink.c: Volume going down to 59454 at 2527478148 D: [alsa-sink] sink.c: Volume change to 59454 at 2527478148 was written 8012 usec late I: [pulseaudio] module-device-restore.c: Restoring mute state for sink alsa_output.pci-0000_00_1b.0.analog-stereo. D: [alsa-sink] alsa-sink.c: Written HW volume did not match with the request: 0: 91% 1: 91% (request) != 0: 89% 1: 89% D: [alsa-sink] alsa-sink.c: in dB: 0: -2.54 dB 1: -2.54 dB (request) != 0: -3.00 dB 1: -3.00 dB D: [pulseaudio] alsa-jack-inputdev.c: jack_report: name HDA Intel PCH Headphone event type 0 code 0 value 0 D: [pulseaudio] alsa-jack-inputdev.c: jack_report: name HDA Intel PCH Headphone event type 5 code 2 value 0 D: [pulseaudio] device-port.c: Setting port analog-output-headphones to status no D: [pulseaudio] module-switch-on-port-available.c: finding port analog-output-headphones D: [alsa-sink] alsa-mixer.c: Activating path analog-output D: [alsa-sink] alsa-mixer.c: Path analog-output (Analog Output), direction=1, priority=99, probed=yes, supported=yes, has_mute=yes, has_volume=yes, has_dB=yes, min_volume=0, max_volume=64, min_dB=-179, max_dB=0 D: [alsa-sink] alsa-mixer.c: Element Master, direction=1, switch=1, volume=1, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x7ffffffffffff, n_channels=1, override_map=yes D: [alsa-sink] alsa-mixer.c: Element Headphone, direction=1, switch=1, volume=3, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x6, n_channels=2, override_map=no D: [alsa-sink] alsa-mixer.c: Element Front, direction=1, switch=1, volume=1, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x6, n_channels=2, override_map=yes D: [alsa-sink] alsa-mixer.c: Element Surround, direction=1, switch=1, volume=1, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x60, n_channels=2, override_map=yes D: [alsa-sink] alsa-mixer.c: Element Center, direction=1, switch=1, volume=1, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x4900000000018, n_channels=1, override_map=yes D: [alsa-sink] alsa-mixer.c: Element LFE, direction=1, switch=1, volume=1, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x80, n_channels=1, override_map=yes D: [alsa-sink] alsa-mixer.c: Element PCM, direction=1, switch=0, volume=1, volume_limit=-1, enumeration=0, required=0, required_any=0, required_absent=0, mask=0x3600000000f66, n_channels=2, override_map=yes 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. D: [alsa-sink] alsa-sink.c: Requested volume: 0: 91% 1: 91% D: [alsa-sink] alsa-sink.c: in dB: 0: -2.54 dB 1: -2.54 dB D: [alsa-sink] alsa-sink.c: Got hardware volume: 0: 91% 1: 91% D: [alsa-sink] alsa-sink.c: in dB: 0: -2.40 dB 1: -2.40 dB D: [alsa-sink] alsa-sink.c: Calculated software volume: 0: 99% 1: 99% (accurate-enough=yes) D: [alsa-sink] alsa-sink.c: in dB: 0: -0.14 dB 1: -0.14 dB I: [pulseaudio] sink.c: Changed port of sink 1 "alsa_output.pci-0000_00_1b.0.analog-stereo" to analog-output D: [alsa-sink] alsa-sink.c: Read hardware volume: 0: 89% 1: 89% D: [alsa-sink] alsa-sink.c: in dB: 0: -3.00 dB 1: -3.00 dB D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event. I: [pulseaudio] module-device-restore.c: Restoring volume for sink alsa_output.pci-0000_00_1b.0.analog-stereo. D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event. D: [alsa-sink] alsa-sink.c: Requested volume: 0: 100% 1: 100% D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB D: [alsa-sink] alsa-sink.c: Got hardware volume: 0: 100% 1: 100% D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB D: [alsa-sink] alsa-sink.c: Calculated software volume: 0: 100% 1: 100% (accurate-enough=yes) D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB D: [alsa-sink] sink.c: Volume going up to 65536 at 2527515460 I: [pulseaudio] module-device-restore.c: Restoring mute state for sink alsa_output.pci-0000_00_1b.0.analog-stereo. D: [pulseaudio] alsa-jack-inputdev.c: jack_report: name HDA Intel PCH Headphone event type 0 code 0 value 0 D: [pulseaudio] protocol-native.c: Client indicator-sound-service changes volume of sink alsa_output.pci-0000_00_1b.0.analog-stereo. D: [alsa-sink] alsa-sink.c: Requested volume: 0: 100% 1: 100% D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB D: [alsa-sink] alsa-sink.c: Got hardware volume: 0: 100% 1: 100% D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB D: [alsa-sink] alsa-sink.c: Calculated software volume: 0: 100% 1: 100% (accurate-enough=yes) D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB D: [alsa-sink] sink.c: Volume going up to 65536 at 2527518452 D: [alsa-sink] sink.c: Volume change to 65536 at 2527515460 was dropped D: [alsa-sink] sink.c: Volume change to 65536 at 2527518452 was written 20 usec late If I look at the volume bar in any of the volume apps I can see the slider jump around reflecting the numbers shown in the output above (100%, 91% or 89%). As I said I'm not necessarily blaming the software, it could be a hardware defect, but that's what I would like to find out. Any ideas of what I could check next? Thanks! On Fri, Dec 2, 2011 at 1:44 AM, Maarten Bosmans <mkbosmans at gmail.com> wrote: > 2011/12/2 Tony Bernardin <sarusama at gmail.com>: > > 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. > > Interesting. Can you provide the full output of pulseaudio -vvvv when > this happens a couple of times? > > Maarten > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss > -------------- next part -------------- An HTML attachment was scrubbed... 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