Follow-up Comment #1, bug #51712 (project grub):
Judging from the documentation I can find, all IPMI serial-over-LAN does is
redirect serial port traffic to a network connection. This functionality
doesn't seem include capturing writes to video memory, whether directly or via
BIOS calls: the OS/bootloader has to be specifically configured to actually
use the virtual serial port instead of the screen and keyboard. I figure this
is true of DOS as well.
Does putting
ctty com3
in AUTOEXEC.BAT help? If yes, this doesn't look like a problem with GRUB.
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