On 19/10/2013 05:06, Kyösti Mälkki wrote:
On 19.10.2013 00:42, John Lewis wrote:
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
Ah, I see what you mean now. No, sorry, don't have anything with a
serial port.
John.
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