Follow-up Comment #5, bug #47406 (project grub): It turns out that the observed symptoms were related to enabling USB debug support in coreboot on the AMD platforms. Disabling USB debug support resolved the GRUB issues.
I am not sure if this is something that GRUB should detect / handle. If not please feel free to mark this request invalid. Thanks! _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?47406> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/ _______________________________________________ Bug-grub mailing list Bug-grub@gnu.org https://lists.gnu.org/mailman/listinfo/bug-grub