Finally i have start a diag mode, dd'ed partition 1 to 5.0.0 and how after reboot i have a same problem like diba, is it necessary to update kernel to 5.0.0 if i has a 5.0.1 before? and which metod i must use "fastboot flash" or dd? if a set by "idme -d --bootmode ..."which boot mode must be set "normal" or "main"?
update: diba looks like we must use
fastboot flash kernel kernel-5.0.0.img
but i stiil looking how to backup it before flash