i upgraded it(Management engine version.)
https://dlcdnets.asus.com/pub/ASUS/GamingNB/DriverforWin10/MEI/MEI_Consumer_ROG_Intel_Z_V2108.100.0.1053Sub2_22755.exe?model=ROG%20Zephyrus%20S17%20GX703
and i use grubshell. (secure boot is off.)
setup_var_cv PchSetup 0x683 0x1 0x0
setup_var_cv PchSetup 0x683 0x1
it worked.
but. ERROR 167 still occured.
this is my result.
btw, Am I clearly off my secureboot?
i know about grubshell not open when secureboot value is on.