I am having trouble getting to the grub boot menu, via a serial console. The
serial console is working and even gives me "Press any key to continue." many
times very nicely, but when I press the any key, I get no menu and grub
eventually times out and boots the default hypervisor. I am using
terminal --timeout=10 console serial
on a machine that has a serial port, using a null modem cable.
The menu works fine over the directly connected keyboard and monitor, so I am
sure it is not a broken menu per se.
I have tried lots of combinations of grub set up, all with the same results or
worse, e.g with and without "sync_console", putting "serial" before "console",
leaving either "console" or "serial" out. I also tried a number of different
line speeds from 115200 all the way down to 9600, but nothing seems to make a
difference. I could not find anything in the Xen wiki about grub menu over
serial, and nothing googled either.
Before I try any more, does anyone know if the grub menu is even supposed to
work over serial, for Xen 4.0.1?
What is the formal meaning of the one-line program
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