package:grub-efi-amd64-signed:1.167+2.04-1ubuntu44
Setting up grub-efi-amd64-signed (1.167+2.04-1ubuntu44) ...
od: /sys/firmware/efi/efivars/SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c: read error: Interrupted system call
/usr/share/grub/grub-check-signatures: 22: [: Illegal number: 
dpkg: error processing package grub-efi-amd64-signed (--configure):
 installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 255