Reset to the text console before exiting grub2 (bsc#1248167) #2726
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The 'Boot from Hard Disk' menu entry exits grub2 and gives back the control to the system firmware, e.g. BIOS or UEFI. Without resetting the terminal output to the text console, SeaBIOS may not clean up the screen and output messages correctly.
Ref: https://bugzilla.suse.com/show_bug.cgi?id=1248167