Can't boot on ODROID C2 anymore

English Install/Boot/Login
1

Since around April, Tumbleweed won’t boot on the ODROID C2[1] anymore, even though it used to work before.
The official image[2] works fine. What could be the issue?
I tried flashing the image both on Linux with the provided one-liner

xzcat [image].raw.xz | dd bs=4M of=/dev/sdX iflag=fullblock oflag=direct; sync

and on Windows with Etcher, to no avail.

[1]
https://en.opensuse.org/HCL:OdroidC2

[2]
https://wiki.odroid.com/getting_started/os_installation_guide#tab__odroid-c2

2

I just tested an older TW snapshot (20190108) that I still had and that one worked fine. Then I upgraded from that to 20190725 and it won’t boot anymore…

3

The kernel from that older (20190108) snapshot should still be on your system. Can you boot to that?

(Use the “Advanced” submenu to choose which kernel to boot).

4

No, I don’t even get to any GRUB menu.

5

Is this using UEFI booting or traditional BIOS booting?

If it is set for UEFI booting, is secure-boot enabled or disabled?

6

On thinking about this, my best guess is that you are using UEFI booting, and a recent change to grub is somehow incompatible with your BIOS. Please note that this is only a guess.

If I’m correct, then there may be an easy workaround.