[Bug 1896782] [NEW] Sound card stops working suddenly

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Ubuntu 20.04 latest update. 
With the latest update the sound goes off all of a sudden. Rebooting helps, but only for an hour or so. I tried re-installing alsa-base et al. No luck. PulseAudio Volume Control is not listing my soundcard at all.

I'm using NVIDIA GEForce GTX 1660Ti with NVIDIA 450.57 driver.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60
Uname: Linux 5.4.0-48-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Wed Sep 23 19:55:43 2020
InstallCmdLine: file=/cdrom/preseed/kubuntu.seed maybe-ubiquity initrd=/casper/initrd quiet splash --- maybe-ubiquity
InstallationDate: Installed on 2020-07-31 (54 days ago)
InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
Symptom: installer
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal ubiquity-20.04.15
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Sound card stops working suddenly
https://bugs.launchpad.net/bugs/1896782
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