[coreboot] HP Pavilion 14 Chromebook - AKA Butterfly

Kyösti Mälkki kyosti.malkki at gmail.com
Sat Oct 19 06:06:03 CEST 2013


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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