Started User Manager for UID 120

dear manager

I’m trying to change kernel, and I changed kernel Image(identified by localverison). And i confirmed UART is working.

But I can’t see GUI, and I faced error “Started User Manager for UID 120”.

Can you help me?

Duplicate from in another thread, but this perhaps does deserve a new thread since it is more or less a new issue more people may run into (and the new topic will help people better find this). See:
https://devtalk.nvidia.com/default/topic/1051147/jetson-tx2-change-kernel-without-full-flash/?offset=13#5335140