Unable to boot from SD

Which system do you use? Android, Ubuntu, OOWOW or others?

Dual boot

Which version of system do you use? Khadas official images, self built images, or others?

official Image

Please describe your issue below:

I set up the dual bbot with android and ubutu from here

Trying to boot from an SD card failed several times. I tried different SD cards andd different images from firmware download (debian, ubutu 22.04 generic). I flashed with etcher with no problem. Trying to boot from SD card system shows “Reboot to LibreELEC” no matter which image I flashed.

Booting “LibreELEC” only leads to boot into Android.

Could anybody help me out?