Additional findings: The v4l2loopback/v4l2-relayd userspace regression has been worked around by downgrading v4l2loopback-dkms to 0.12.7-2ubuntu5+exp.1 and configuring a virtual V4L2 device. Applications such as Cheese and Teams can now see a “Virtual Camera” device (test pattern).
However, this confirms that the root cause is not v4l2loopback. libcamera does not detect any hardware cameras on this system: cam --list → “Available cameras:” (empty) This shows that the internal IPU6/MIPI camera sensor is not exposed to userspace on this Dell Pro 16 Plus (PB16250) with Ubuntu 24.04 OEM kernel, even though IPU6 kernel modules load correctly. This appears to be a hardware enablement / ACPI / sensor support issue for this specific model rather than a userspace configuration problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2136769 Title: v4l2loopback >= 0.14.0 breaks gstreamer/noble To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2136769/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
