Não há som no cabo HDMI

Question

Como o título sugere, não consigo reproduzir nenhum som na minha TV externa por meio do cabo HDMI. Observar que começar a usar o mesmo notebook com o Windows não causa nenhum tipo de problema.

Já experimentei toda a solução encontrada até agora na Web,

• speaker-test -c 2 -r 48000 -D hw:0,3 e / ou speaker-test -D hdmi:CARD=PCH,DEV=0 -c 2
• Atualizando o driver alsa para a última versão (agora tenho o oem-audio-hda-daily-dkms: amd64 0.201702010732 ~ ubuntu14.04.1 instalado)
• Use pulseaudio, alsamixer ou o gerenciador de som padrão para alternar para a porta de saída HDMI
• pulseaudio -k para reiniciar o daemon pulseaudio
• adicionando meu usuário a vários grupos com usermod -a -G audio,pulse,pulse-access,video,voice $USER

mas, como foi dito, nada mudou.

Aqui está uma saída útil

dpkg -l | grep alsa ii alsa-base 1.0.25+dfsg-0ubuntu4 all ALSA driver configuration files ii alsa-utils 1.0.27.2-1ubuntu2 amd64 Utilities for configuring and using ALSA ii bluez-alsa:amd64 4.101-0ubuntu13.1 amd64 Bluetooth ALSA support ii gnome-alsamixer 0.9.7~cvs.20060916.ds.1-5 amd64 ALSA sound mixer for GNOME ii gstreamer0.10-alsa:amd64 0.10.36-1.1ubuntu2 amd64 GStreamer plugin for ALSA ii libsox-fmt-alsa:amd64 14.4.1-3ubuntu1 amd64 SoX alsa format I/O library

>lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)

>sudo lshw | grep -A9 "Audio"
 description: Audio device
 product: 7 Series/C210 Series Chipset Family High Definition Audio Controller
 vendor: Intel Corporation
 physical id: 1b
 bus info: pci@0000:00:1b.0
 version: 04
 width: 64 bits
 clock: 33MHz
 capabilities: pm msi pciexpress bus_master cap_list
 configuration: driver=snd_hda_intel latency=0
 resources: irq:47 memory:f1610000-f1613fff

>aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: 92HD91BXX Analog [92HD91BXX Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: Generic Digital [Generic Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

N.B .: Não sei se pode ser um problema, mas tenho dois subdevices: 1/1.

>pacmd list-cards
Welcome to PulseAudio! Use "help" for usage information.
>>> 1 card(s) available.
    index: 0
    name: <alsa_card.pci-0000_00_1b.0>
    driver: <module-alsa-card.c>
    owner module: 5
    properties:
        alsa.card = "0"
        alsa.card_name = "HDA Intel PCH"
        alsa.long_card_name = "HDA Intel PCH at 0xf1610000 irq 47"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:1b.0"
        sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"
        device.bus = "pci"
        device.vendor.id = "8086"
        device.vendor.name = "Intel Corporation"
        device.product.id = "1e20"
        device.product.name = "7 Series/C210 Series Chipset Family High Definition Audio Controller"
        device.form_factor = "internal"
        device.string = "0"
        device.description = "Built-in Audio"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    profiles:
        input:analog-stereo: Analogue Stereo Input (priority 60, available: unknown)
        output:analog-stereo: Analogue Stereo Output (priority 6000, available: unknown)
        output:analog-stereo+input:analog-stereo: Analogue Stereo Duplex (priority 6060, available: unknown)
        output:hdmi-stereo: Digital Stereo (HDMI) Output (priority 5400, available: unknown)
        output:hdmi-stereo+input:analog-stereo: Digital Stereo (HDMI) Output + Analogue Stereo Input (priority 5460, available: unknown)
        off: Off (priority 0, available: unknown)
    active profile: <output:hdmi-stereo+input:analog-stereo>
    sinks:
        alsa_output.pci-0000_00_1b.0.hdmi-stereo/#0: Built-in Audio Digital Stereo (HDMI)
    sources:
        alsa_output.pci-0000_00_1b.0.hdmi-stereo.monitor/#0: Monitor of Built-in Audio Digital Stereo (HDMI)
        alsa_input.pci-0000_00_1b.0.analog-stereo/#1: Built-in Audio Analogue Stereo
    ports:
        analog-input-microphone-internal: Internal Microphone (priority 8900, latency offset 0 usec, available: unknown)
            properties:
                device.icon_name = "audio-input-microphone"
        analog-input-microphone: Microphone (priority 8700, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "audio-input-microphone"
        analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
            properties:
                device.icon_name = "audio-speakers"
        analog-output-headphones: Headphones (priority 9000, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "audio-headphones"
        hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: unknown)
            properties:
                device.icon_name = "video-display"

Algumas imagens

... do Controle de Volume do PulseAudio ...

...misturadorGnomeAlsa...

...eogerenciadordesompadrão

Eu não sei mais o que tentar e qualquer ajuda é muito apreciada.

Obrigado antecipadamente.