On Mon, 28 Sep 2026 22:23:39 +0200 Steven Agbo <[email protected]> wrote:
v4l2loopback-dkms 0.15.0-2 fails to build against any kernel >= 6.18, which includes the 7.1.x kernels currently in trixie-backports. The module is therefore unusable for anyone running a backports kernel on trixie. It builds fine against trixie's own 6.12 kernel, hence "important" rather than "serious".
typically, I would close this bug by uploading a new (fixed) version to Debian/unstable. however, v4l2loopback_0.15.4-1 (which fixes the problem) is already available in Debian/testing aka forky (and Debian/unstable).
so the actual issue here is that you are using a kernel from backports, and v4l2loopback is (currently) not available in Debian/backports.
i'm lowering the severity to "wishlist" (the issue is really a "request for packaging v4l2loopback for Debian/backports"), as i do not have plans to support backports right now.
until somebody steps up and an volunteers, feel free to install the v4l2loopback-dkms package from Debian/testing: <https://packages.debian.org/testing/v4l2loopback-dkms>
(dependency-wise this shouldn't be a problem) cheers. gasmdr IOhannes
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