I apologise - I misspoke earlier. Could you please try GRUB_GFXPAYLOAD_LINUX=text (not keep) in /etc/default/grub and run update-grub?
Your comments about this depending on what GRUB does to the display suggest to me that this will probably work.
I apologise - I misspoke earlier. Could you please try GRUB_GFXPAYLOAD _LINUX= text (not keep) in /etc/default/grub and run update-grub?
Your comments about this depending on what GRUB does to the display suggest to me that this will probably work.