Advanced information - PCI Vendor/Device/Subsystem ID's
!!-------------------------------------------------------

00:1b.0 0403: 8086:1c20 (rev 05)
        Subsystem: 103c:1658


http://git.kernel.org/?p=linux/kernel/git/tiwai/sound.git;a=commitdiff;h=0c27c1805269f9ff01cc1d77752a662065ebcfe5;hp=acb03d440b8a723181e1d45e3517e43cb0792f8a


+                         "HP", STAC_92HD83XXX_HP_cNB11_INTQUAD),
+       SND_PCI_QUIRK(PCI_VENDOR_ID_HP, 0x1658,


your laptop are hardcoded to use 4speaker model and there is no headphone 
playback volume control

how many speakers do you have ?


        active profile: <output:analog-stereo+input:analog-stereo>
        sinks:
                alsa_output.pci-0000_00_1b.0.analog-stereo/#0: Built-in Audio 
Analog Stereo
        sources:
                alsa_output.pci-0000_00_1b.0.analog-stereo.monitor/#0: Monitor 
of Built-in Audio Analog Stereo
                alsa_input.pci-0000_00_1b.0.analog-stereo/#1: Built-in Audio 
Analog Stereo
        ports:
                analog-output-speaker: Speakers (priority 10000, available: 
unknown)
                        properties:
                                


post the pulseaudio log

https://wiki.ubuntu.com/PulseAudio/Log

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https://bugs.launchpad.net/bugs/1099237

Title:
  Audio Stopped Working

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