Comment 4 for bug 1772374

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Chen-Han Hsiao (Stanley) (swem) wrote :

http://manpages.ubuntu.com/manpages/bionic/man8/efibootmgr.8.html

Note: efibootmgr requires that the kernel support access to EFI non-volatile variables through /sys/firmware/efi/vars or /sys/firmware/efi/efivars/.