IOS 6.1 has removed sound, volume controls

On updating to iOS 6.1 this evening I find that I've lost all volume controls, except in the 'Sounds' section of 'Settings'.  The hardware buttons don't work; and the slider doesn't appear in apps.  There is no sound from the speakers during playback.  This is after a couple of power cycles and a hard reset.  Is there a fix?  Thanks.

Thanks for the suggestion - I tried it, but it didn't work.
I've since established that everything works as it should if headphones are connected.  But once the headphones are unplugged, all the sound is off again, the sliders vanish, and the side buttons do nothing.  It's a software problem - the speakers do work because the ringer volume can be adjusted within 'Settings' -> 'Sound' - it's just disabled across the rest of the system.

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    I: [pulseaudio] svolume_sse.c: Initialising SSE2 optimized volume functions.
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    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC1D0p' failed (-2)
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    I: [pulseaudio] alsa-util.c: Error opening PCM device surround41:1: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC1D0p' failed (-2)
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    I: [pulseaudio] alsa-util.c: Successfully attached to mixer 'hw:1'
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    I: [pulseaudio] (alsa-lib)control.c: Invalid CTL hdmi:1,2
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    I: [pulseaudio] alsa-util.c: Successfully attached to mixer 'hw:1'
    I: [pulseaudio] (alsa-lib)control.c: Invalid CTL hdmi:1,2
    I: [pulseaudio] alsa-util.c: Unable to attach to mixer hdmi:1,2: No such file or directory
    I: [pulseaudio] alsa-util.c: Successfully attached to mixer 'hw:1'
    I: [pulseaudio] (alsa-lib)control.c: Invalid CTL hdmi:1,2
    I: [pulseaudio] alsa-util.c: Unable to attach to mixer hdmi:1,2: No such file or directory
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    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:1,2
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:1,2: No such file or directory
    I: [pulseaudio] (alsa-lib)control.c: Invalid CTL hdmi:1,3
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    I: [pulseaudio] alsa-util.c: Unable to attach to mixer hdmi:1,3: No such file or directory
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    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:1,3: No such file or directory
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    I: [pulseaudio] alsa-util.c: Successfully attached to mixer 'hw:1'
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    I: [pulseaudio] alsa-util.c: Successfully attached to mixer 'hw:1'
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:1,4
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:1,4: No such file or directory
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    I: [pulseaudio] alsa-util.c: Successfully attached to mixer 'hw:1'
    I: [pulseaudio] (alsa-lib)control.c: Invalid CTL hdmi:1,5
    I: [pulseaudio] alsa-util.c: Unable to attach to mixer hdmi:1,5: No such file or directory
    I: [pulseaudio] alsa-util.c: Successfully attached to mixer 'hw:1'
    I: [pulseaudio] (alsa-lib)control.c: Invalid CTL hdmi:1,5
    I: [pulseaudio] alsa-util.c: Unable to attach to mixer hdmi:1,5: No such file or directory
    I: [pulseaudio] alsa-util.c: Successfully attached to mixer 'hw:1'
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:1,5
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:1,5: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC1D12p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:1,6: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC1D12p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:1,6: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC1D12p' failed (-2)
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    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:1,6
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    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC1D13p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:1,7: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC1D13p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:1,7: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC1D13p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:1,7: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:1,7
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:1,7: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC1D0c' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device hw:1: No such file or directory
    I: [pulseaudio] module-card-restore.c: Restoring port latency offsets for card alsa_card.pci-0000_01_00.1.
    I: [pulseaudio] card.c: Created 0 "alsa_card.pci-0000_01_00.1"
    I: [pulseaudio] alsa-util.c: Successfully attached to mixer 'hw:1'
    I: [pulseaudio] alsa-util.c: Trying to disable ALSA period wakeups, using timers only
    I: [pulseaudio] alsa-util.c: ALSA period wakeups disabled
    I: [pulseaudio] alsa-sink.c: Successfully opened device hdmi:1.
    I: [pulseaudio] alsa-sink.c: Selected mapping 'Digital Stereo (HDMI)' (hdmi-stereo).
    I: [pulseaudio] alsa-sink.c: Successfully enabled mmap() mode.
    I: [pulseaudio] alsa-sink.c: Successfully enabled timer-based scheduling mode.
    I: [pulseaudio] (alsa-lib)control.c: Invalid CTL hdmi:1
    I: [pulseaudio] alsa-util.c: Unable to attach to mixer hdmi:1: No such file or directory
    I: [pulseaudio] alsa-util.c: Successfully attached to mixer 'hw:1'
    I: [pulseaudio] sink.c: Created sink 0 "alsa_output.pci-0000_01_00.1.hdmi-stereo" with sample spec s16le 2ch 44100Hz and channel map front-left,front-right
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    I: [pulseaudio] sink.c: device.api = "alsa"
    I: [pulseaudio] sink.c: device.class = "sound"
    I: [pulseaudio] sink.c: alsa.class = "generic"
    I: [pulseaudio] sink.c: alsa.subclass = "generic-mix"
    I: [pulseaudio] sink.c: alsa.name = "HDMI 0"
    I: [pulseaudio] sink.c: alsa.id = "HDMI 0"
    I: [pulseaudio] sink.c: alsa.subdevice = "0"
    I: [pulseaudio] sink.c: alsa.subdevice_name = "subdevice #0"
    I: [pulseaudio] sink.c: alsa.device = "3"
    I: [pulseaudio] sink.c: alsa.card = "1"
    I: [pulseaudio] sink.c: alsa.card_name = "HD-Audio Generic"
    I: [pulseaudio] sink.c: alsa.long_card_name = "HD-Audio Generic at 0xfbf9c000 irq 28"
    I: [pulseaudio] sink.c: alsa.driver_name = "snd_hda_intel"
    I: [pulseaudio] sink.c: device.bus_path = "pci-0000:01:00.1"
    I: [pulseaudio] sink.c: sysfs.path = "/devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1"
    I: [pulseaudio] sink.c: device.bus = "pci"
    I: [pulseaudio] sink.c: device.vendor.id = "1002"
    I: [pulseaudio] sink.c: device.vendor.name = "Advanced Micro Devices, Inc. [AMD/ATI]"
    I: [pulseaudio] sink.c: device.product.id = "aac0"
    I: [pulseaudio] sink.c: device.string = "hdmi:1"
    I: [pulseaudio] sink.c: device.buffering.buffer_size = "352768"
    I: [pulseaudio] sink.c: device.buffering.fragment_size = "176384"
    I: [pulseaudio] sink.c: device.access_mode = "mmap+timer"
    I: [pulseaudio] sink.c: device.profile.name = "hdmi-stereo"
    I: [pulseaudio] sink.c: device.profile.description = "Digital Stereo (HDMI)"
    I: [pulseaudio] sink.c: device.description = "HD-Audio Generic Digital Stereo (HDMI)"
    I: [pulseaudio] sink.c: alsa.mixer_name = "ATI R6xx HDMI"
    I: [pulseaudio] sink.c: alsa.components = "HDA:1002aa01,00aa0100,00100500"
    I: [pulseaudio] sink.c: module-udev-detect.discovered = "1"
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    I: [pulseaudio] source.c: device.description = "Monitor of HD-Audio Generic Digital Stereo (HDMI)"
    I: [pulseaudio] source.c: device.class = "monitor"
    I: [pulseaudio] source.c: alsa.card = "1"
    I: [pulseaudio] source.c: alsa.card_name = "HD-Audio Generic"
    I: [pulseaudio] source.c: alsa.long_card_name = "HD-Audio Generic at 0xfbf9c000 irq 28"
    I: [pulseaudio] source.c: alsa.driver_name = "snd_hda_intel"
    I: [pulseaudio] source.c: device.bus_path = "pci-0000:01:00.1"
    I: [pulseaudio] source.c: sysfs.path = "/devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1"
    I: [pulseaudio] source.c: device.bus = "pci"
    I: [pulseaudio] source.c: device.vendor.id = "1002"
    I: [pulseaudio] source.c: device.vendor.name = "Advanced Micro Devices, Inc. [AMD/ATI]"
    I: [pulseaudio] source.c: device.product.id = "aac0"
    I: [pulseaudio] source.c: device.string = "1"
    I: [pulseaudio] source.c: module-udev-detect.discovered = "1"
    I: [pulseaudio] source.c: device.icon_name = "audio-card-pci"
    I: [pulseaudio] alsa-sink.c: Using 2.0 fragments of size 176384 bytes (999.91ms), buffer size is 352768 bytes (1999.82ms)
    I: [pulseaudio] alsa-sink.c: Time scheduling watermark is 20.00ms
    I: [pulseaudio] alsa-sink.c: Driver does not support hardware volume control, falling back to software volume control.
    I: [pulseaudio] alsa-sink.c: Driver does not support hardware mute control, falling back to software mute control.
    I: [alsa-sink-HDMI 0] core-util.c: Successfully enabled SCHED_RR scheduling for thread, with priority 5.
    I: [alsa-sink-HDMI 0] alsa-sink.c: Starting playback.
    I: [pulseaudio] module.c: Loaded "module-alsa-card" (index: #6; argument: "device_id="1" name="pci-0000_01_00.1" card_name="alsa_card.pci-0000_01_00.1" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes card_properties="module-udev-detect.discovered=1"").
    I: [pulseaudio] module-udev-detect.c: Card /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1 (alsa_card.pci-0000_01_00.1) module loaded.
    I: [pulseaudio] (alsa-lib)utils.c: could not open configuration file /usr/share/alsa/ucm/USB Camera-B4.09.24.1/USB Camera-B4.09.24.1.conf
    I: [pulseaudio] (alsa-lib)parser.c: error: could not parse configuration for card USB Camera-B4.09.24.1
    I: [pulseaudio] (alsa-lib)main.c: error: failed to import USB Camera-B4.09.24.1 use case configuration -2
    I: [pulseaudio] alsa-ucm.c: UCM not available for card USB Camera-B4.09.24.1
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Failed to set hardware parameters on plug:hw:2: Invalid argument
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Failed to set hardware parameters on plug:front:2: Invalid argument
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Failed to set hardware parameters on plug:hw:2: Invalid argument
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Failed to set hardware parameters on plug:iec958:2: Invalid argument
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device hw:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device front:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device hw:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device surround21:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device surround40:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device surround41:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device surround50:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device surround51:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device surround71:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device iec958:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM a52:2
    I: [pulseaudio] alsa-util.c: Error opening PCM device a52:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM a52:2
    I: [pulseaudio] alsa-util.c: Error opening PCM device a52:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dca:2
    I: [pulseaudio] alsa-util.c: Error opening PCM device dca:2: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.0:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.0:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.0:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:2
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:2: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.1:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,1
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,1: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.1:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,1
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,1: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.1:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,1
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,1: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:2,1
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:2,1: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.2:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,2
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,2: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.2:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,2
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,2: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.2:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,2
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,2: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:2,2
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:2,2: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.3:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,3
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,3: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.3:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,3
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,3: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.3:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,3
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,3: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:2,3
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:2,3: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.4:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,4
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,4: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.4:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,4
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,4: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.4:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,4
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,4: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:2,4
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:2,4: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.5:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,5
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,5: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.5:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,5
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,5: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.5:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,5
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,5: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:2,5
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:2,5: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.6:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,6
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,6: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.6:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,6
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,6: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.6:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,6
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,6: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:2,6
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:2,6: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.7:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,7
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,7: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.7:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,7
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,7: No such file or directory
    I: [pulseaudio] (alsa-lib)confmisc.c: Unable to find definition 'cards.USB-Audio.pcm.hdmi.7:CARD=2,AES0=4,AES1=130,AES2=0,AES3=2'
    I: [pulseaudio] (alsa-lib)conf.c: function snd_func_refer returned error: No such file or directory
    I: [pulseaudio] (alsa-lib)conf.c: Evaluate error: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM hdmi:2,7
    I: [pulseaudio] alsa-util.c: Error opening PCM device hdmi:2,7: No such file or directory
    I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM dcahdmi:2,7
    I: [pulseaudio] alsa-util.c: Error opening PCM device dcahdmi:2,7: No such file or directory
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Device hw:2 doesn't support 44100 Hz, changed to 16000 Hz.
    I: [pulseaudio] (alsa-lib)pcm_hw.c: open '/dev/snd/pcmC2D0p' failed (-2)
    I: [pulseaudio] alsa-util.c: Error opening PCM device hw:2: No such file or directory
    I: [pulseaudio] module-card-restore.c: Restoring port latency offsets for card alsa_card.usb-OmniVision_Technologies__Inc._USB_Camera-B4.09.24.1-01-CameraB409241.
    I: [pulseaudio] card.c: Created 1 "alsa_card.usb-OmniVision_Technologies__Inc._USB_Camera-B4.09.24.1-01-CameraB409241"
    I: [pulseaudio] alsa-util.c: Disabling tsched mode since BATCH flag is set
    I: [pulseaudio] alsa-util.c: Device hw:2 doesn't support 44100 Hz, changed to 16000 Hz.
    I: [pulseaudio] alsa-source.c: Successfully opened device hw:2.
    I: [pulseaudio] alsa-source.c: Selected mapping 'Multichannel' (multichannel).
    I: [pulseaudio] alsa-source.c: Cannot enable timer-based scheduling, falling back to sound IRQ scheduling.
    I: [pulseaudio] alsa-source.c: Successfully enabled mmap() mode.
    W: [pulseaudio] alsa-util.c: Unable to load mixer: Invalid argument
    I: [pulseaudio] alsa-source.c: Failed to find a working mixer device.
    I: [pulseaudio] source.c: Created source 1 "alsa_input.usb-OmniVision_Technologies__Inc._USB_Camera-B4.09.24.1-01-CameraB409241.multichannel" with sample spec s16le 4ch 16000Hz and channel map front-left,front-right,rear-left,rear-right
    I: [pulseaudio] source.c: alsa.resolution_bits = "16"
    I: [pulseaudio] source.c: device.api = "alsa"
    I: [pulseaudio] source.c: device.class = "sound"
    I: [pulseaudio] source.c: alsa.class = "generic"
    I: [pulseaudio] source.c: alsa.subclass = "generic-mix"
    I: [pulseaudio] source.c: alsa.name = "USB Audio"
    I: [pulseaudio] source.c: alsa.id = "USB Audio"
    I: [pulseaudio] source.c: alsa.subdevice = "0"
    I: [pulseaudio] source.c: alsa.subdevice_name = "subdevice #0"
    I: [pulseaudio] source.c: alsa.device = "0"
    I: [pulseaudio] source.c: alsa.card = "2"
    I: [pulseaudio] source.c: alsa.card_name = "USB Camera-B4.09.24.1"
    I: [pulseaudio] source.c: alsa.long_card_name = "OmniVision Technologies, Inc. USB Camera-B4.09.24.1 at usb-0000:00:1d.0-1.2, hi"
    I: [pulseaudio] source.c: alsa.driver_name = "snd_usb_audio"
    I: [pulseaudio] source.c: device.bus_path = "pci-0000:00:1d.0-usb-0:1.2:1.1"
    I: [pulseaudio] source.c: sysfs.path = "/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.1/sound/card2"
    I: [pulseaudio] source.c: udev.id = "usb-OmniVision_Technologies__Inc._USB_Camera-B4.09.24.1-01-CameraB409241"
    I: [pulseaudio] source.c: device.bus = "usb"
    I: [pulseaudio] source.c: device.vendor.id = "1415"
    I: [pulseaudio] source.c: device.vendor.name = "Nam Tai E&E Products Ltd. or OmniVision Technologies, Inc."
    I: [pulseaudio] source.c: device.product.id = "2000"
    I: [pulseaudio] source.c: device.product.name = "Sony Playstation Eye"
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    I: [pulseaudio] module.c: Loaded "module-default-device-restore" (index: #10; argument: "").
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    I: [pulseaudio] module.c: Unloaded "module-filter-apply" (index: #20).
    I: [pulseaudio] module.c: Unloading "module-filter-heuristics" (index: #19).
    I: [pulseaudio] module.c: Unloaded "module-filter-heuristics" (index: #19).
    I: [pulseaudio] module.c: Unloading "module-role-cork" (index: #18).
    I: [pulseaudio] module.c: Unloaded "module-role-cork" (index: #18).
    I: [pulseaudio] module.c: Unloading "module-position-event-sounds" (index: #17).
    I: [pulseaudio] module.c: Unloaded "module-position-event-sounds" (index: #17).
    I: [pulseaudio] module.c: Unloading "module-systemd-login" (index: #16).
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    I: [pulseaudio] module.c: Unloading "module-console-kit" (index: #15).
    I: [pulseaudio] module.c: Unloaded "module-console-kit" (index: #15).
    I: [pulseaudio] module.c: Unloading "module-suspend-on-idle" (index: #14).
    I: [pulseaudio] module.c: Unloaded "module-suspend-on-idle" (index: #14).
    I: [pulseaudio] module.c: Unloading "module-intended-roles" (index: #13).
    I: [pulseaudio] module.c: Unloaded "module-intended-roles" (index: #13).
    I: [pulseaudio] module.c: Unloading "module-always-sink" (index: #12).
    I: [pulseaudio] module.c: Unloaded "module-always-sink" (index: #12).
    I: [pulseaudio] module.c: Unloading "module-rescue-streams" (index: #11).
    I: [pulseaudio] module.c: Unloaded "module-rescue-streams" (index: #11).
    I: [pulseaudio] module.c: Unloading "module-default-device-restore" (index: #10).
    I: [pulseaudio] module.c: Unloaded "module-default-device-restore" (index: #10).
    I: [pulseaudio] module.c: Unloading "module-native-protocol-unix" (index: #9).
    I: [pulseaudio] module.c: Unloaded "module-native-protocol-unix" (index: #9).
    I: [pulseaudio] module.c: Unloading "module-esound-protocol-unix" (index: #8).
    I: [pulseaudio] module.c: Unloaded "module-esound-protocol-unix" (index: #8).
    I: [pulseaudio] module.c: Unloading "module-alsa-card" (index: #7).
    I: [pulseaudio] source.c: Freeing source 1 "alsa_input.usb-OmniVision_Technologies__Inc._USB_Camera-B4.09.24.1-01-CameraB409241.multichannel"
    I: [pulseaudio] card.c: Freed 1 "alsa_card.usb-OmniVision_Technologies__Inc._USB_Camera-B4.09.24.1-01-CameraB409241"
    I: [pulseaudio] module.c: Unloaded "module-alsa-card" (index: #7).
    I: [pulseaudio] module.c: Unloading "module-alsa-card" (index: #6).
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    I: [pulseaudio] module.c: Unloaded "module-alsa-card" (index: #6).
    I: [pulseaudio] module.c: Unloading "module-udev-detect" (index: #5).
    I: [pulseaudio] module.c: Unloaded "module-udev-detect" (index: #5).
    I: [pulseaudio] module.c: Unloading "module-switch-on-port-available" (index: #4).
    I: [pulseaudio] module.c: Unloaded "module-switch-on-port-available" (index: #4).
    I: [pulseaudio] module.c: Unloading "module-augment-properties" (index: #3).
    I: [pulseaudio] module.c: Unloaded "module-augment-properties" (index: #3).
    I: [pulseaudio] module.c: Unloading "module-card-restore" (index: #2).
    I: [pulseaudio] module.c: Unloaded "module-card-restore" (index: #2).
    I: [pulseaudio] module.c: Unloading "module-stream-restore" (index: #1).
    I: [pulseaudio] module.c: Unloaded "module-stream-restore" (index: #1).
    I: [pulseaudio] module.c: Unloading "module-device-restore" (index: #0).
    I: [pulseaudio] module.c: Unloaded "module-device-restore" (index: #0).
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