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My sound just ceased to be from one day to the next, in Ubuntu 20.04.

No sound card appears in sound settings except Dummy output.

pacmd list-cards:

0 card(s) available.

lspci -nnk | grep -A2 Audio:

09:00.1 Audio device [0403]: NVIDIA Corporation GM204 High Definition Audio Controller [10de:0fbb] (rev a1) Subsystem: ZOTAC International (MCO) Ltd. GM204 High Definition Audio Controller [19da:1366] 0a:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Function [1022:148a] Subsystem: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Function [1022:148a] -- 0b:00.4 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD Audio Controller [1022:1487] Subsystem: ASRock Incorporation Starship/Matisse HD Audio Controller [1849:1202]

None of the solutions on the following thread worked for me:

Only "Dummy output" (sound) in Ubuntu 20.04 after reboot - Broken driver / module

Any thoughts would be appreciated

user234899
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1 Answers1

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It seems the loss of the sound card was due to upgrading the kernel from 5.6.0-64 to 5.8.0-38.

Here is the solution:

1.boot to 5.4.0-64

2.sudo apt-mark hold 5.4.0-64-generic

3.sudo apt remove -y $(dpkg -l | grep -o -P "linux-[\S]*-5.8.0[\d\S]+")

4.reboot

5.sudo apt update && sudo apt -y upgrade && sudo apt autoremove

In the future, to revert to kernel upgrades, we will do:

6.sudo apt-mark unhold 5.4.0-64-generic

user234899
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