Public bug reported: Apps like OBS, which use v4l2loopback to create virtual cameras, have started losing their ability to create virtual cameras. In the case of OBS, it's able to create a camera one time. When the camera or app is "shutdown" the camera is unable to be created again unless a user manually removes the modprobe rule with "sudo modprobe -r v4l2loopback"
Ubuntu 20.04 comes with "0.12.5-1ubuntu1". That version seems to exhibit this behavior. If you "downgrade" to "0.12.5-1" from https://packages.ubuntu.com/groovy/all/v4l2loopback-dkms/download the problem is gone. The author of v4l2loopback indicates this "is a problem with Ubuntu specific modifications" and it should be reported here. This is documented here: https://github.com/umlaeute/v4l2loopback/issues/404 https://github.com/obsproject/obs-studio/issues/4808 ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: v4l2loopback-dkms 0.12.5-1ubuntu1 ProcVersionSignature: Ubuntu 5.11.0-37.41-generic 5.11.22 Uname: Linux 5.11.0-37-generic x86_64 ApportVersion: 2.20.11-0ubuntu65.3 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Mon Oct 11 08:50:33 2021 InstallationDate: Installed on 2020-05-01 (527 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) PackageArchitecture: all ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: v4l2loopback UpgradeStatus: Upgraded to hirsute on 2021-06-03 (130 days ago) ** Affects: v4l2loopback (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug hirsute -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1946660 Title: Ubuntu port of v4l2loopback doesn't behave the same as official port (v0.12.5) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/v4l2loopback/+bug/1946660/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
