Do you get sound (HDMI) through your monitor speakers with the official vendor image?

https://fi.mirror.armbian.de/apt/pool/noble-utils/b/base-files/ They are in. Perhaps need some time for repo to get in sync.

Addressing the need for reliable hardware testing for RISC-V adoption, the RISE Project and Collabora added two RISC-V boards to Collabora's LAVA testing lab. View the full article

Building a rolling release is more than just showing that in the MOTD. If you do "sudo apt upgrade" in an OS image you just built, you probably will have zero or one packages to upgrade. If you start with an image built a long time ago, or with packages defined a long time ago, then "sudo apt upgrade" would take a long time.

I have the same debian as you: 5.1.4-xxx-v4l2request, installed over Debian Bookworm, with Linux 6.15 (OS built by myself). When I tried the ffmpeg-7.x.x-v4l2request for Trixie, I could not get hardware acceleration.