Sorry for the late reply, email was not available to me yesterday. Here is the -vvvv output of the periodic messages:<div><br></div><div><div>D: [pulseaudio] alsa-jack-inputdev.c: jack_report: name HDA Intel PCH Headphone event type 5 code 2 value 1</div> <div>D: [pulseaudio] device-port.c: Setting port analog-output-headphones to status yes</div><div>D: [pulseaudio] module-switch-on-port-available.c: finding port analog-output-headphones</div><div>D: [alsa-sink] alsa-mixer.c: Activating path analog-output-headphones</div> <div>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</div> <div>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</div><div> 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</div><div> 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</div><div>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</div> <div>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</div><div> 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</div><div>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</div> <div>I: [alsa-sink] alsa-sink.c: Successfully enabled synchronous volume.</div><div>I: [alsa-sink] alsa-sink.c: Hardware volume ranges from -179.00 dB to 0.00 dB.</div><div>I: [alsa-sink] alsa-sink.c: Fixing base volume to 0.00 dB</div> <div>I: [alsa-sink] alsa-sink.c: Using hardware volume control. Hardware dB scale supported.</div><div>I: [alsa-sink] alsa-sink.c: Using hardware mute control.</div><div>D: [alsa-sink] alsa-sink.c: Requested volume: 0: 100% 1: 100%</div> <div>D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB</div><div>D: [alsa-sink] alsa-sink.c: Got hardware volume: 0: 100% 1: 100%</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB</div> <div>D: [alsa-sink] alsa-sink.c: Calculated software volume: 0: 100% 1: 100% (accurate-enough=yes)</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB</div><div>I: [pulseaudio] sink.c: Changed port of sink 1 "alsa_output.pci-0000_00_1b.0.analog-stereo" to analog-output-headphones</div> <div>D: [alsa-sink] alsa-sink.c: Read hardware volume: 0: 100% 1: 100%</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB</div><div>I: [pulseaudio] module-device-restore.c: Restoring volume for sink alsa_output.pci-0000_00_1b.0.analog-stereo.</div> <div>D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.</div><div>D: [alsa-sink] alsa-sink.c: Requested volume: 0: 91% 1: 91%</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: -2.54 dB 1: -2.54 dB</div> <div>D: [alsa-sink] alsa-sink.c: Got hardware volume: 0: 91% 1: 91%</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: -2.40 dB 1: -2.40 dB</div><div>D: [alsa-sink] alsa-sink.c: Calculated software volume: 0: 99% 1: 99% (accurate-enough=yes)</div> <div>D: [alsa-sink] alsa-sink.c: in dB: 0: -0.14 dB 1: -0.14 dB</div><div>D: [alsa-sink] sink.c: Volume going down to 59454 at 2527478148</div><div>D: [alsa-sink] sink.c: Volume change to 59454 at 2527478148 was written 8012 usec late</div> <div>I: [pulseaudio] module-device-restore.c: Restoring mute state for sink alsa_output.pci-0000_00_1b.0.analog-stereo.</div><div>D: [alsa-sink] alsa-sink.c: Written HW volume did not match with the request: 0: 91% 1: 91% (request) != 0: 89% 1: 89%</div> <div>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</div><div>D: [pulseaudio] alsa-jack-inputdev.c: jack_report: name HDA Intel PCH Headphone event type 0 code 0 value 0</div> <div>D: [pulseaudio] alsa-jack-inputdev.c: jack_report: name HDA Intel PCH Headphone event type 5 code 2 value 0</div><div>D: [pulseaudio] device-port.c: Setting port analog-output-headphones to status no</div><div>D: [pulseaudio] module-switch-on-port-available.c: finding port analog-output-headphones</div> <div>D: [alsa-sink] alsa-mixer.c: Activating path analog-output</div><div>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</div> <div>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</div><div> 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</div><div>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</div> <div>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</div><div>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</div> <div>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</div><div>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</div> <div>I: [alsa-sink] alsa-sink.c: Successfully enabled synchronous volume.</div><div>I: [alsa-sink] alsa-sink.c: Hardware volume ranges from -179.00 dB to 0.00 dB.</div><div>I: [alsa-sink] alsa-sink.c: Fixing base volume to 0.00 dB</div> <div>I: [alsa-sink] alsa-sink.c: Using hardware volume control. Hardware dB scale supported.</div><div>I: [alsa-sink] alsa-sink.c: Using hardware mute control.</div><div>D: [alsa-sink] alsa-sink.c: Requested volume: 0: 91% 1: 91%</div> <div>D: [alsa-sink] alsa-sink.c: in dB: 0: -2.54 dB 1: -2.54 dB</div><div>D: [alsa-sink] alsa-sink.c: Got hardware volume: 0: 91% 1: 91%</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: -2.40 dB 1: -2.40 dB</div> <div>D: [alsa-sink] alsa-sink.c: Calculated software volume: 0: 99% 1: 99% (accurate-enough=yes)</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: -0.14 dB 1: -0.14 dB</div><div>I: [pulseaudio] sink.c: Changed port of sink 1 "alsa_output.pci-0000_00_1b.0.analog-stereo" to analog-output</div> <div>D: [alsa-sink] alsa-sink.c: Read hardware volume: 0: 89% 1: 89%</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: -3.00 dB 1: -3.00 dB</div><div>D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.</div> <div>I: [pulseaudio] module-device-restore.c: Restoring volume for sink alsa_output.pci-0000_00_1b.0.analog-stereo.</div><div>D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.</div><div>D: [alsa-sink] alsa-sink.c: Requested volume: 0: 100% 1: 100%</div> <div>D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB</div><div>D: [alsa-sink] alsa-sink.c: Got hardware volume: 0: 100% 1: 100%</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB</div> <div>D: [alsa-sink] alsa-sink.c: Calculated software volume: 0: 100% 1: 100% (accurate-enough=yes)</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB</div><div>D: [alsa-sink] sink.c: Volume going up to 65536 at 2527515460</div> <div>I: [pulseaudio] module-device-restore.c: Restoring mute state for sink alsa_output.pci-0000_00_1b.0.analog-stereo.</div><div>D: [pulseaudio] alsa-jack-inputdev.c: jack_report: name HDA Intel PCH Headphone event type 0 code 0 value 0</div> <div>D: [pulseaudio] protocol-native.c: Client indicator-sound-service changes volume of sink alsa_output.pci-0000_00_1b.0.analog-stereo.</div><div>D: [alsa-sink] alsa-sink.c: Requested volume: 0: 100% 1: 100%</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB</div> <div>D: [alsa-sink] alsa-sink.c: Got hardware volume: 0: 100% 1: 100%</div><div>D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB</div><div>D: [alsa-sink] alsa-sink.c: Calculated software volume: 0: 100% 1: 100% (accurate-enough=yes)</div> <div>D: [alsa-sink] alsa-sink.c: in dB: 0: 0.00 dB 1: 0.00 dB</div><div>D: [alsa-sink] sink.c: Volume going up to 65536 at 2527518452</div><div>D: [alsa-sink] sink.c: Volume change to 65536 at 2527515460 was dropped</div> <div>D: [alsa-sink] sink.c: Volume change to 65536 at 2527518452 was written 20 usec late</div></div><div><br></div><div>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%).</div> <div><br></div><div>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?</div><div><br></div><div>Thanks!</div> <div><br><br><div class="gmail_quote">On Fri, Dec 2, 2011 at 1:44 AM, Maarten Bosmans <span dir="ltr"><<a href="mailto:mkbosmans@gmail.com">mkbosmans@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> 2011/12/2 Tony Bernardin <<a href="mailto:sarusama@gmail.com">sarusama@gmail.com</a>>:<br> <div><div class="h5">> Sorry if I'm posting this question in the wrong list. I've been trying to<br> > search for this issue, but have been unsuccessful so far with not even a<br> > hint at what I could try to get to the bottom of this. I'm not very familiar<br> > with the sound system.<br> ><br> > The symptom: regular hiccup in the sound output.<br> ><br> > What I've found:<br> > launching the pulseaudio daemon with -v showed that it is constantly<br> > changing the port of the sync:<br> ><br> > I: [pulseaudio] sink.c: Changed port of sink 1<br> > "alsa_output.pci-0000_00_1b.0.analog-stereo" to analog-output<br> > I: [pulseaudio] module-device-restore.c: Restoring volume for sink<br> > alsa_output.pci-0000_00_1b.0.analog-stereo.<br> > I: [pulseaudio] module-device-restore.c: Restoring mute state for sink<br> > alsa_output.pci-0000_00_1b.0.analog-stereo.<br> > I: [alsa-sink] alsa-sink.c: Successfully enabled synchronous volume.<br> > I: [alsa-sink] alsa-sink.c: Hardware volume ranges from -179.00 dB to 0.00<br> > dB.<br> > I: [alsa-sink] alsa-sink.c: Fixing base volume to 0.00 dB<br> > I: [alsa-sink] alsa-sink.c: Using hardware volume control. Hardware dB scale<br> > supported.<br> > I: [alsa-sink] alsa-sink.c: Using hardware mute control.<br> > I: [pulseaudio] sink.c: Changed port of sink 1<br> > "alsa_output.pci-0000_00_1b.0.analog-stereo" to analog-output-headphones<br> > I: [pulseaudio] module-device-restore.c: Restoring volume for sink<br> > alsa_output.pci-0000_00_1b.0.analog-stereo.<br> > I: [pulseaudio] module-device-restore.c: Restoring mute state for sink<br> > alsa_output.pci-0000_00_1b.0.analog-stereo.<br> > I: [alsa-sink] alsa-sink.c: Successfully enabled synchronous volume.<br> > I: [alsa-sink] alsa-sink.c: Hardware volume ranges from -179.00 dB to 0.00<br> > dB.<br> > I: [alsa-sink] alsa-sink.c: Fixing base volume to 0.00 dB<br> > I: [alsa-sink] alsa-sink.c: Using hardware volume control. Hardware dB scale<br> > supported.<br> > I: [alsa-sink] alsa-sink.c: Using hardware mute control.<br> ><br> > I noticed this also reflected in the "sound settings", and the port changes<br> > coincide with the hiccups.<br> ><br> > This is on up-to-date Ubuntu 11.10, where I believe the pulseaudio version<br> > 1.0. The underlying hardware is Intel HD audio that is integrated on the Z68<br> > motherboard.<br> ><br> > I'd greatly appreciate any suggestions as how I could get to the bottom of<br> > this issue? Maybe it's not pulseaudio's fault, but I don't know what<br> > configures these ports.<br> <br> </div></div>Interesting. Can you provide the full output of pulseaudio -vvvv when<br> this happens a couple of times?<br> <br> Maarten<br> _______________________________________________<br> pulseaudio-discuss mailing list<br> <a href="mailto:pulseaudio-discuss@lists.freedesktop.org">pulseaudio-discuss@lists.freedesktop.org</a><br> <a href="http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss" target="_blank">http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss</a><br> </blockquote></div><br></div>