Verify on Dell CID 202010-28345
1. boot into Ubuntu focal 2. check sound settings 3. Input Device is empty 4. plug the headset 5. Input Device is still empty 6. enable proposed channel 7. $ sudo apt install pulseaudio 8. $ apt policy pulseaudio pulseaudio: Installed: 1:13.99.1-1ubuntu3.9 Candidate: 1:13.99.1-1ubuntu3.9 Version table: *** 1:13.99.1-1ubuntu3.9 500 500 http://archive.ubuntu.com/ubuntu focal-proposed/main amd64 Packages 100 /var/lib/dpkg/status 1:13.99.1-1ubuntu3.8 500 500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 1:13.99.1-1ubuntu3 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages 9. $ sudo reboot 10. after boot into Ubuntu focal 11. open sound settings 12. plug headset 13. can see "Headset Microphone - Built-in-Audio" in "Input Device" field.
Verify on Dell CID 202010-28345
1. boot into Ubuntu focal 1-1ubuntu3. 9 1-1ubuntu3. 9 1-1ubuntu3. 9 500 archive. ubuntu. com/ubuntu focal-proposed/main amd64 Packages dpkg/status 13.99.1- 1ubuntu3. 8 500 archive. ubuntu. com/ubuntu focal-updates/main amd64 Packages security. ubuntu. com/ubuntu focal-security/main amd64 Packages 13.99.1- 1ubuntu3 500 archive. ubuntu. com/ubuntu focal/main amd64 Packages
2. check sound settings
3. Input Device is empty
4. plug the headset
5. Input Device is still empty
6. enable proposed channel
7. $ sudo apt install pulseaudio
8. $ apt policy pulseaudio
pulseaudio:
Installed: 1:13.99.
Candidate: 1:13.99.
Version table:
*** 1:13.99.
500 http://
100 /var/lib/
1:
500 http://
500 http://
1:
500 http://
9. $ sudo reboot
10. after boot into Ubuntu focal
11. open sound settings
12. plug headset
13. can see "Headset Microphone - Built-in-Audio" in "Input Device" field.