Intel MEBX User Guide for Intel 7 Series Chipset

Intel® ME Manageability Features
Appendix C: Global Reset from MEBx
Several MEBx configuration options require a global reset after they have been
edited by the user. The reset is flagged while in the MEBx UI and passed back to
BIOS to perform the reset request. The MEBx UI has to keep track of which
configuration options require a global reset after exiting MEBx. Multiple
techniques are used to ensure the global reset flow is entered correctly. The
MEBx uses 2 flags for its logic related to signaling global resets: Reboot and
Exit. The ‘Reboot’ flag indicates that the current option will require a reboot after
exiting MEBx. The ‘Exit’ flag is used to force the user out of the MEBx UI.
Reboot – MEBx must set this flag when an option that requires a global reset has
been edited from its original state. A list of global reset options is itemized in the
table below.
Exit – MEBx must completely exit the UI immediately after editing the option.
Table of MEBx UI Global Reset Options:
Option
Reboot
Exit
Max Logins exceeded
Y
Y
CPU String Emulation
Y
N
Manageability Feature Selection (EN->DIS)
Y
N
Manageability Feature Selection (DIS->EN)
N
N
SOL IDER Username/Password
Y
N
KVM State
Y
N
SOL state
Y
N
IDER state
Y
N
Other MEBx global reset scenarios include
1. CPU replacement
2. ME Unconfiguration without MEBx password through system BIOS setting
(BPF)
3. ME Unconfiguration by clearing CMOS
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