The submitted '/boot/grub/grub.cfg' is the output of above '/etc/default/grub' and will not work below
-> grub 2.02~beta2-4
but without any restriction below
-> grub 2.00-22
The '/boot/grub/themes/***/theme.txt' ist working with 'secure-boot' witout restrictions on all systems.
The submitted '/boot/ grub/grub. cfg' is the output of above '/etc/default/grub' and will not work below
-> grub 2.02~beta2-4
but without any restriction below
-> grub 2.00-22
The '/boot/ grub/themes/ ***/theme. txt' ist working with 'secure-boot' witout restrictions on all systems.