Internal speaker (Audio) is not working in Ubuntu 20.04

Internal speaker (Audio) is not working in Ubuntu 20.04. Only Dummy output in the selection of output device.

UPDATE (2021-12-04) - I made a conclusion after reading posts of owners of Huawei Matebook D16 that the problem is with sound card (Everest) in this model of laptop. It's not supported yet.

Detailed alsa information: http://alsa-project.org/db/?f=0728a726fdfae280fcc1b9fc801432288a931cf3

**** List of PLAYBACK Hardware Devices ****
card 0: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Generic [HD-Audio Generic], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Generic [HD-Audio Generic], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

There are only HDMI in the list of Playback hardware devices, may be problem is here? Notebook is Huawei Matebood 16D with AMD core.

I tried a lot of solutions found on the internet:

1. Add lines to "/etc/modprobe.d/alsa-base.conf"

options snd-hda-intel model=auto
options snd-hda-intel dmic_detect=0

2. Add "radeon.audio=1" to "/etc/default/grub"

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.audio=1"

3. Remove and reinstall "analog"

sudo apt-get remove analog
sudo apt-get install analog

4. Update linux Kernel to 5.15.6

Nothing helped to hear sound on Ubuntu :( Audio works on Windows.

Your ALSA have loaded snd_acp3x_rn module, but card was not recognized fully, unlike snd_hda_intel. Since you are using dual boot, the problem can be ‘Fast Startup’, that puts hardware into a hybrid hibernation state instead of a full shutdown. Disabling Fast Startup is a must when dual-booting. Shutdown.

The origin of this hint is here: https://forum.manjaro.org/t/sound-from-speakers-no-sound-from-3-5mm-jack-audio-amd-thinkpad-e595/13717/6

EDIT: another idea. There can be wrong module loaded for your sound card. Try to blacklist the following modules in /etc/modprobe.d/blacklist.conf:

    blacklist snd_acp3x_rn
    blacklist snd-acp3x-pdm-dma
    blacklist snd-acpx-rn
    blacklist snd-rn-pci-acp3x

Blacklist them one-by-one, reboot after each. Check the result with aplay -l.