The most interesting thing is that everything works fine for joshua-riek Ubuntu 24.04 with the 6.1 kernel https://joshua-riek.github.io/ubuntu-rockchip-download/boards/orangepi-5-plus.html

Armbian kernel and BSP Debian/Ubuntu userland

With the armbian build system, you can build either Bookworm or Trixie You will always get the latest Bookworm or the latest Trixie packages in a freshly built armbian OS. This is what's meant by "always rolling release"... not to be understood as "always sid or Trixie". Independently, the armbian build system will let you choose a stable Linux version, or the latest available from Armbian (edge).

You are still using an old Linux. You need Linux 6.13 or newer. You need to build your own Armbian OS. Also, don't forget the cma=256M kernel argument

Ho ! That's a new thing isn't it ? And IMHO, a strange choice. Is there a way to disable that rolling release during the image building process?