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I saw following error message recurring several times on kernel log. Can anybody make an interpretation of it?

efi: EFI v2.40 by INSYDE Corp.
efi: SMBIOS=0x8c630000 ESRT=0x8c62ef18 ACPI 2.0=0x8cffd014 RNG=0x8c635198 TPMEventLog=0x8331f018 
efi: seeding entropy pool
random: fast init done
[Firmware Bug]: TPM Final Events table missing or invalid
secureboot: Secure boot enabled
Kernel is locked down from EFI Secure Boot mode; see man kernel_lockdown.7
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  • What version of Ubuntu?
    – David
    Apr 14, 2021 at 8:17
  • Ubuntu 20.04.2 LTS but I updated after last restart. I think it was 20.04 before. Apr 14, 2021 at 8:30
  • Did you do as it suggests in the error? *see man kernel_lockdown.7
    – David
    Apr 14, 2021 at 8:34
  • Yes, it returns: No manual entry for kernel_lockdown.7 Apr 14, 2021 at 8:36
  • This link is the man page *man7.org/linux/man-pages/man7/kernel_lockdown.7.html
    – David
    Apr 14, 2021 at 8:40

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