Sophos XG86w Firewall forgets the date and time as well as the DMI environment variables after power cycle

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  • juergenb
    Member
    • Jan 2018
    • 42
    • Germany
    #1

    Sophos XG86w Firewall forgets the date and time as well as the DMI environment variables after power cycle

    Hello,

    I have a small Sophos XG86w firewall here, which is still working so far. But there is a problem with the BIOS and the DMI environment variables.

    The hardware forgets the date and time after a reboot or a power failure.
    The DMI environment variables are also reset to default values.

    I have now tried 2 different batteries (CR2032).
    I reset the DMI vars via an EFI shell and with AMIDEEFI64 (v5.21.0057).

    However, after a reboot or a power cycle, these values are reset again.

    It is an Apollo Lake platform with an Intel Atom E3930

    Where can I look for the cause on the board?
    Is the eeprom defective?

    thanks in advance
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