2nd August 2017, 18:45
The error is safe to be ignored. That probably comes with the new kernel that detects a faulty ACPI implementation on your mainboard.
As for the graphical grub make sure that the GRUB_THEME is set in /etc/default/grub.
It should be set to /boot/grub/themes/maui. If it isn't please do this (you need root rights [sudo]) and run update-grub aswell.
As for the graphical grub make sure that the GRUB_THEME is set in /etc/default/grub.
It should be set to /boot/grub/themes/maui. If it isn't please do this (you need root rights [sudo]) and run update-grub aswell.