I am using a Hauppauge HVR-1950 TV tuner with my Dell Inspiron 5567 laptop. When using the tuner the picture and audio break up as if the signal is weak. All of the kernels since upgrading to 20.04 have failed, most recently 5.4.0-73
It worked fine when I was using 18.04 Bionic Beaver and it works with the current bionic kernel, 4.15.0-143
It also works with the mainline kernel, most recently 5.4.111
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-73-generic 5.4.0-73.82
ProcVersionSignature: Ubuntu 5.4.0-73.82-generic 5.4.106
Uname: Linux 5.4.0-73-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: dennis 1042 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon May 31 10:25:28 2021
InstallationDate: Installed on 2019-10-01 (608 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
MachineType: Dell Inc. Inspiron 5567
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-73-generic root=UUID=35b8961f-2fe6-4648-a54e-583d411153fd ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.4.0-73-generic N/A
linux-backports-modules-5.4.0-73-generic N/A
linux-firmware 1.187.12
SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2020-10-02 (241 days ago)
dmi.bios.date: 07/09/2018
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.2.6
dmi.board.name: 04M49V
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.2.6:bd07/09/2018:svnDellInc.:pnInspiron5567:pvr:rvnDellInc.:rn04M49V:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 5567
dmi.product.sku: 0767
dmi.sys.vendor: Dell Inc.
I also tried the kernel from Groovy Gorilla 5.8.0-36 and from Hirsute Hippo 5.11.0-16
Both failed.