alsa force-reload needed to fix my sound after upgrade to 20.04

[ubuntu_demon]

After upgrading from Ubuntu Mate 18.04 LTS to Ubuntu Mate 20.04 LTS "sudo alsa force-reload" is needed to fix my sound.

I upgraded yesterday (23rd) before the official announcements of 20.04 LTS. Using "do-release-upgrade -d".

I'm not sure yet how often I have to run "sudo alsa force-reload". When I have no sound a reboot is not a guranteed fix although it worked once.

Booting into a Ubuntu Desktop 20.04 LTS gets working sounds each time I tried.

Audio: Device-1: Intel 6 Series/C200 Series Family High Definition Audio driver: snd_hda_intel
           Sound Server: ALSA v: k5.4.0-26-generic

[ubuntu_demon (ubuntu-demon)]

What is also noticeable is that the audio controls on the upper right of the screen is missing. I can still open "Sound" from the mate menu.

[ubuntu_demon (ubuntu-demon)]

Some additional background information.

1)
I have installed regolith side-by-side following these instructions:
https://regolith-linux.org/download/

The sound problem also happens in Regolith.

2)
I have also had a few occasions where alsa force-reload doesn't appear to help and a reboot is needed followed by alsa force-reload.

3)
For some applications it's necessary to do "start-pulseaudio-x11" after the alsa force-reload.

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal:

  apport-collect 1874689

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Michal Trachta (tracht)]

Also affected. Having Ubuntu 20.04 LTS (the default flavor).

lspci -v (yes, I have 2 gpus)

04:00.1 Audio device: NVIDIA Corporation TU116 High Definition Audio Controller (rev a1)
 Subsystem: NVIDIA Corporation TU116 High Definition Audio Controller
 Flags: bus master, fast devsel, latency 0, IRQ 135
 Memory at fa080000 (32-bit, non-prefetchable) [size=16K]
 Capabilities: <access denied>
 Kernel driver in use: snd_hda_intel
 Kernel modules: snd_hda_intel

09:00.1 Audio device: NVIDIA Corporation TU116 High Definition Audio Controller (rev a1)
 Subsystem: NVIDIA Corporation TU116 High Definition Audio Controller
 Flags: bus master, fast devsel, latency 0, IRQ 136
 Memory at fc080000 (32-bit, non-prefetchable) [size=16K]
 Capabilities: <access denied>
 Kernel driver in use: snd_hda_intel
 Kernel modules: snd_hda_intel

0b:00.4 Audio device: Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD Audio Controller
 Subsystem: Gigabyte Technology Co., Ltd Starship/Matisse HD Audio Controller
 Flags: bus master, fast devsel, latency 0, IRQ 138
 Memory at fc400000 (32-bit, non-prefetchable) [size=32K]
 Capabilities: <access denied>
 Kernel driver in use: snd_hda_intel
 Kernel modules: snd_hda_intel

[Launchpad Janitor (janitor)]

[Expired for alsa-driver (Ubuntu) because there has been no activity for 60 days.]