How to build vim4 ubuntu22.04 rootfs?

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

`vim4 ubuntu22.04

Please describe your issue below:

`I used the vim4 board, and then downloaded the source code and compiled it successfully,
Then I burned *. img into vim4 and found that rootfs has not changed.
The phy driver module I wrote didn’t burn in. What is the reason?
Another question is how is the Fenix source code rootfs generated?

Post a console log of your issue below: