As a warning:   I have a RockPro64 that was initial setup using the Armbian 20.02.1 buster desktop image (using the 5.4.20 kernel). Over the past few months, I have accepted each minor release of Armbian up to the 20.05.7 release with a 5.4.49 kernel   Yesterday, I installed the 20.08 upgrade with 5.7.15 kernel, and the board failed to boot. I have only just got it working again. (I had to restore the kernel and supporting files from a recent backup, and restore symlinks in /