On 19.10.2013 00:42, John Lewis wrote:
<clip>
Find attached my grub.cfg with both serial and usb consoles, also
enabling some debugging for USB storage there. You could possibly move
set debug="usb" before the insmods, but you may need to revert it before
using serial_usb0.
The easiest way is to use a desktop board booting to grub and have it
provide grub shell over serial terminal. Those would be the first five
lines. You can then copy-paste other commands while capturing all
communication to logfile to check for any handshake with the BBB.
Kyösti
I'm unsure exactly what you mean. I thought that with the correct
grub.cfg the grub output would just continue where the BIOS debug output
finished i.e. going to the Beaglebone?
I have tried a grub.cfg with just the first 5 lines and with just the
usb relevant stuff, hoping I would get a grub prompt over the gadget
tty, but to no avail.
John.
This was a proposal for a setup for a mainboard with old-style serial
port so you could debug why console using the gadget driver does not
come up.
For further discussion on this particular topic, better address the GRUB
mailing lists.
Kyöst
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