You could try to write the bootloader again to the SD-card, it seems like it's mixed up. Old with new. not sure if the names are exactly like this but something like this: cd /usr/lib/linux-u-boot-vendor-orangepi-5 sudo dd if=u-boot-rockchip.bin of=/dev/sdx seek=64 conv=fsync sudo sync

Any direction on where to look/fix?

There are three ways to do this. The first simplest is to assemble a binary debian package using the Armbiyan assembly system and then convert it to a rpm package directly in a running OpenSuse OS. The second way is more complicated but it is more correct. You can take patches directly from the build system and apply them to OpenSuse kernel sources in the sequence in which the build system does this while running. Next, build the kernel package using rpmbuild. The third way is the same as the second but use OBS. This will allow you to have your own repository of signed packages and install them using zypper. You can find like-minded people anywhere on our planet, including this place. Hope this helps you.

Yes, cpufrequtils has been removed upstream. It's not anymore in Debian stable. https://packages.debian.org/search?searchon=names&keywords=cpufrequtils

Hey, I think I'm impacted by the same issue. I've replaced the original fan of the HC4 with a Noctua NF-A4x10 5V PWM earlier this year. It was working as expected, but since couple weeks the fan is at 100% speed continuously, which is loud. It sounds like it's a software upgrade that broke the PWM control, but no idea which one. I've done part of the same testing you mentioned but didn't managed to find a fix neither. I'm probably even more beginner than you, so I don't think I can help much unfortunately. How can we get more eyes on this issue? Did you post on Odroid Forum?