Flashing Linux image onto STM32F746-Discovery with u-boot

[JD.239]

I have a STM32F746 discovery board and tried to compile a linux following this git:

https://github.com/fdu/STM32F746G-disco_Buildroot

After a lot of fiddling (because of file names not matching) I ended up with the files. According to wireshark the files were transmitted onto the STM32, but the screen remains white and nothing shows success.

Anything I can try?

Best regards