My Ubuntu (20.04) Software is prompting a new firmware available: UEFI dbx 77--> 217
(?), but when I try to update I receive the following error message:
Impossible to update UEFI dbx.
Blocked executable in the ESP, ensure grub and shim are up to date:/boot/efi/EFI/Boot/shimx64.efi Authenticode checksum [_checksum code_] is presente in dbx.
I am not really sure what this implies and, if I understood it correctly, why is it jumping from version 77 to 217. A bit more of details on the system:
$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 39 bits physical, 48 bits virtual
CPU(s): 12
On-line CPU(s) list: 0-11
Thread(s) per core: 2
Core(s) per socket: 6
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 165
Model name: Intel(R) Core(TM) i7-10850H CPU @ 2.70GHz