@JooJoo Bee666 Thanks for the logs. They are basically the same, but kbd and mouse swapped between Bus2 and Bus4. I don't see a reason, why one is not booting. Seems best to disable USB boot (already done in armbian/build::main) with an exception for R2S.
@cal5582 If you compile Armbian, there's a Debian package for the kernel (such as inux-image-current-spacemit_26.08.0-trunk_riscv64__6.18.44-S1b8a-D0000-Pa617-C999999-H20f3-HK01ba-Vc222-Bb84f-R448a.deb) but no source*.deb. To compile on the board, you can copy the kernel source tree from cache/sources/linux-kernel-worktree/ (the 6.18__spacemit__riscv64 directory) e.g. to /usr/src. Then simply issue "make" in there. Since the compiler already is pre-installed for DKMS-bcmdhd (wifi) this should work. After ~3 hours, you should be able to "make install" and "make modules_install". Check in /boot if you need to adapt for a different linux-image file name (extlinux.conf). HTH // Sven-Ola