No Sound Over HDMI in i3

I just fresh installed Manjaro with i3. I connect my speakers via my monitor's audio jack. There is no sound over HDMI. I only installed Pulseaudio after the fresh installation.

The speaker system works fine in my previous Manjaro KDE and the alongside Windows.

When I run pavucontrol, I can see nothing is muted. I selected the HDMI that is shown plugged in. I can see audio volume is pumping.

My headphone worked once when I directly connect it to my PC. I can not reduplicate that anymore after I try to change the setting in the pavucontrol. I reverted everything back and there is no sound in my headphone.

Hardware :
I have i7-4790k with Nvidia 1080.

Thanks for helping in advance.

please post 'inxi -Fxz' as usual to get an overview. if your not using the nvidia-driver but instead nouveau, bumblebee, or the hybrid-driver than hdmi-sound is not avaiable.

Thank you for replying. It seems that I am using a Nvidia driver.

System:    Host: i3wm Kernel: 5.6.16-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.1.0 
           Desktop: i3 4.18.1 Distro: Manjaro Linux 
Machine:   Type: Desktop Mobo: ASRock model: Z97 Killer serial: <filter> UEFI: American Megatrends 
           v: P2.20 date: 05/12/2015 
Battery:   Device-1: hidpp_battery_0 model: Logitech K520 charge: 70% (should be ignored) 
           status: Discharging 
CPU:       Topology: Quad Core model: Intel Core i7-4790K bits: 64 type: MT MCP arch: Haswell 
           rev: 3 L2 cache: 8192 KiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 64000 
           Speed: 1474 MHz min/max: 800/4400 MHz Core speeds (MHz): 1: 1861 2: 1755 3: 1825 4: 1869 
           5: 1663 6: 1368 7: 1841 8: 1785 
Graphics:  Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics 
           vendor: ASRock driver: i915 v: kernel bus ID: 00:02.0 
           Device-2: NVIDIA GP104 [GeForce GTX 1080] vendor: ASUSTeK driver: nvidia v: 440.82 
           bus ID: 05:00.0 
           Display: x11 server: X.Org 1.20.8 driver: nvidia resolution: 3840x2160~30Hz 
           OpenGL: renderer: GeForce GTX 1080/PCIe/SSE2 v: 4.6.0 NVIDIA 440.82 direct render: Yes 
Audio:     Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor HD Audio vendor: ASRock 
           driver: snd_hda_intel v: kernel bus ID: 00:03.0 
           Device-2: Intel 9 Series Family HD Audio vendor: ASRock driver: snd_hda_intel v: kernel 
           bus ID: 00:1b.0 
           Device-3: NVIDIA GP104 High Definition Audio vendor: ASUSTeK driver: snd_hda_intel 
           v: kernel bus ID: 05:00.1 
           Sound Server: ALSA v: k5.6.16-1-MANJARO 
Network:   Device-1: Qualcomm Atheros Killer E220x Gigabit Ethernet vendor: ASRock driver: alx 
           v: kernel port: e000 bus ID: 04:00.0 
           IF: enp4s0 state: down mac: <filter> 
           Device-2: Qualcomm Atheros AR93xx Wireless Network Adapter driver: ath9k v: kernel 
           port: d000 bus ID: 06:00.0 
           IF: wlp6s0 state: up mac: <filter> 
Drives:    Local Storage: total: 1.19 TiB used: 6.84 GiB (0.6%) 
           ID-1: /dev/sda vendor: SanDisk model: SDSSDXPS240G size: 223.57 GiB 
           ID-2: /dev/sdb vendor: Western Digital model: WD10EZEX-08WN4A0 size: 931.51 GiB 
           ID-3: /dev/sdc type: USB vendor: SanDisk model: Cruzer size: 58.42 GiB 
Partition: ID-1: / size: 906.94 GiB used: 6.84 GiB (0.8%) fs: ext4 dev: /dev/sdb2 
           ID-2: swap-1 size: 8.80 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sdb3 
Sensors:   System Temperatures: cpu: 34.0 C mobo: N/A gpu: nvidia temp: 45 C 
           Fan Speeds (RPM): N/A gpu: nvidia fan: 0% 
Info:      Processes: 190 Uptime: 2h 24m Memory: 15.52 GiB used: 806.7 MiB (5.1%) Init: systemd 
           Compilers: gcc: 10.1.0 Shell: bash v: 5.0.17 inxi: 3.0.37 

check out 'aplay -l' if your hdmi audio is recognized. i have to leave now but post it that others can give you further support.

Yes, I understand that. Thank you for specifying the general guideline. I did search a lot of posts. My situation now is kind of weird to me. I once made the headphone worked, but I can not duplicated with every setting that I have changed. I suspect it is something that I am not seeing from other posts.

*** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 9: HDMI 3 [HDMI 3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 10: HDMI 4 [HDMI 4]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: ALC1150 Analog [ALC1150 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 1: ALC1150 Digital [ALC1150 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 10: HDMI 4 [HDMI 4]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 11: HDMI 5 [HDMI 5]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 12: HDMI 6 [HDMI 6]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

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