cannot allocate memory using vbi0

[Nigel Reed]

I think this issue started happening with a late 5.x kernel and has persisted through 6.x

# cat < /dev/vbi0
cat: -: Cannot allocate memory

I should be getting data from the vbi0 device.

# lsb_release -rd
Description: Ubuntu 22.04.3 LTS
Release: 22.04

I'm not sure if this is a bt878 bug but seems a good place to start.

Happy to provide more details as requested.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-modules-extra-6.2.0-34-generic 6.2.0-34.34~22.04.1
ProcVersionSignature: Ubuntu 6.2.0-34.34~22.04.1-generic 6.2.16
Uname: Linux 6.2.0-34-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Mon Oct 16 13:33:05 2023
Dependencies:
 linux-modules-6.2.0-34-generic 6.2.0-34.34~22.04.1
 wireless-regdb 2022.06.06-0ubuntu1~22.04.1
InstallationDate: Installed on 2022-01-26 (627 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
ProcEnviron:
 LANGUAGE=en.UTF-8
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-hwe-6.2
UpgradeStatus: No upgrade log present (probably fresh install)

[Nigel Reed (nelgin)]

Nobody?