This seems like a firmware issue on certain older devices where they fail to correctly display GRUB in graphical mode (which is the default).
Using GRUB_TERMINAL=console is a valid workaround.
It is not clear to me how this issue could be resolved in GRUB unfortunately.
This seems like a firmware issue on certain older devices where they fail to correctly display GRUB in graphical mode (which is the default).
Using GRUB_TERMINAL= console is a valid workaround.
It is not clear to me how this issue could be resolved in GRUB unfortunately.