According to the log of #8, the pulseaudio fails to detect/initialize the sound 
card:
0 card(s) available.
2 sink input(s) available.
    index: 3
        driver: <protocol-native.c>
        flags: 
        state: RUNNING


Is the ubuntu you installed the stock ubuntu 21.04? From the log you provided, 
the kernel and audio driver worked well, but the pulseaudio had some problem.

Could you debug the pulseaudio to find why there is no valid sound card
in the PA?

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https://bugs.launchpad.net/bugs/1939205

Title:
  sound dummy output 21.04

Status in linux package in Ubuntu:
  New

Bug description:
  no more sound device /output since dist upgrade from 20.10 to 21.04

  tried both official ubuntu kernel 5.11.0.26 and newer
  5.13.8-051308-generic

  alsa log:

  http://alsa-project.org/db/?f=07dfaad1d5d30948449dc36f0caaf39c99145cce

  lsb_release -rd
  Description:  Ubuntu 21.04
  Release:      21.04

  apt-cache policy pkgname
  N: Unable to locate package pkgname

   ubuntu-bug linux:  package not installed

  
  cat /proc/version_signature > version.log
  cat: /proc/version_signature: No such file or directory

  sudo lspci -vnvn > lspci-vnvn.log
  pcilib: sysfs_read_vpd: read failed: Input/output error

  
  be descriptive in helping as im a newbie to linux troubleshoot  :)

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