using bionic, eoan & focal on x96max+2 (meson-g12a-x96-max.dtb) y always get a cyan background as shown in attached image:

https://photos.app.goo.gl/VmgmZ5nCSkYKnPgR7

 

solved!, writing from the device, 

 

just renamed u_boot.sd to u_boot.ext and it worked

 

Edited August 2, 20206 yr by rforcen

Broken monitor/cable?

33 minutes ago, Werner said:

Broken monitor/cable?

thanks for replying but it's solved renaming u_boot.sd to u_boot.ext

This is already part of the instructions for balbes150 builds.  From the first post of balbes150 thread:

 

"Fix for correct color to G12 (Amlogic S905X2 S922X)

For models based on g12 (s905x2 s922), which have a problem not the correct color , 

If you are starting the system from an SD card, you need to copy file  u-boot.sd to u-boot.ext,

If you are starting the system from an USB, you need to copy file  u-boot.usb to u-boot.ext

When installing in eMMC, you do not need to do anything with your hands, the installation script itself will perform the necessary system configuration and when running from eMMC, the system will work with the correct color."