Hello
I don't know if anyone is currently looking for how to fix these problems.
I have a Pinebook 14" (720p) and tried the following:
Last published image: Armbian_community_25.2.0-trunk.377_Pinebook-a64_bookworm_current_6.6.72_minimal.img.xz
The boot screen is displayed
After the message "Starting kernel" the screen turns off completely for about 1 minute
Then the backlight turns on but the screen stays black indefinitely
The system is unusable
Last image available in the archive: Armbian_23.8.1_Pinebook-a64_bookworm_current_6.1.47.img.xz
The system boots without showing the boot screen
The message "Welcome to ARMBIAN" is displayed and the configuration process begins
The system works correctly and allows installation on the eMMC
After performing an "update" and "upgrade" the system is unusable as in the last published image.