No HDMI sound output option after the last update

Support Audio
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After no answers in this topic, I decided to format and reinstall the whole system, then I discovered the cause of the problem:

The cause is this workaround suggested in the stable update topic

For AMD GPU users having a black screen with kernel 5.10
Due to a bug in the AMD drivers, please try the following first:

  1. Open a terminal or a TTY
  2. Open /etc/default/grub in your favourite CLI editor (nano vi, emacs`)
  3. Find the line: GRUB_CMDLINE_LINUX_DEFAULT="
  4. Add amdgpu.dc=0
  5. Save
  6. Execute sudo update-grub and reboot

My solution is to remove the “amdgpu.dc=0” from grub and boot using kernel 5.9, since 5.10 requires this workaround