Public bug reported: 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) ** Affects: v4l2loopback (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug impish -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1936250 Title: modprobe: ERROR: could not insert 'v4l2loopback': Invalid argument To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/v4l2loopback/+bug/1936250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs