modprobe: ERROR: could not insert 'v4l2loopback': Invalid argument

[Erich Eickmeyer]

This looks like it has to do with a recent version of the package.

A recent update to v4l2loopback has caused it to fail with the following error message when modprobe is done:

modprobe: ERROR: could not insert 'v4l2loopback': Invalid argument

This may have to do with an incompatibility with the kernel version and the dkms module. It seems to compile fine, but cannot be inserted.

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: v4l2loopback-dkms 0.12.5-1ubuntu2
ProcVersionSignature: Ubuntu 5.11.0-20.21+21.10.1-lowlatency 5.11.21
Uname: Linux 5.11.0-20-lowlatency x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu67
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Wed Jul 14 12:11:36 2021
InstallationDate: Installed on 2021-03-20 (115 days ago)
InstallationMedia: Ubuntu-Studio 21.04 "Hirsute Hippo" - Alpha amd64 (20210320)
PackageArchitecture: all
SourcePackage: v4l2loopback
UpgradeStatus: Upgraded to impish on 2021-06-13 (31 days ago)

[Erich Eickmeyer (eeickmeyer)]

Looks like this is fixed upstream. I'll put the commit into a patch and upload. https://github.com/umlaeute/v4l2loopback/issues/439

[Launchpad Janitor (janitor)]

This bug was fixed in the package v4l2loopback - 0.12.5-1ubuntu3

---------------
v4l2loopback (0.12.5-1ubuntu3) impish; urgency=medium

  * Don't fail if allocating 0-sized buffers (LP: #1936250)

 -- Erich Eickmeyer <email address hidden> Thu, 29 Jul 2021 17:54:49 +0000