[coreboot] Chromebox debugging.
kyosti.malkki at gmail.com
Fri Jan 31 12:44:09 CET 2014
On 01/31/2014 11:03 AM, Timothy Potter wrote:
> Hi Kyosti,
> Sorry, I reread your first reply and it became clear what you meant when
> looking on the Chomebox's /var/log directory. I found the port at the back
> corner of the Chromebox is numbered 2-1.2. None of the external ports
> connect as 1-1.2. Connecting the phone with the EHCI debug device enabled
> kernel to the 2-1.2 port and booting Ubuntu on the Chromebox I see the
> following in kmesg:
> [ 2.008799] usb 2-1.2: new high-speed USB device number 3 using ehci_hcd
Assuming usb 2 is PCI 0:1d.0 (which would have been clearly identified
in parts of the log you did not send), use USBDEBUG_HCD_INDEX=1 for
Default kernel configuration will not output anything on usbdebug. Now
that you know the correct physical USB port, have the phone powered on
and connected, run 'cat /dev/ttyGS0' and then boot the chromebox with
the coreboot image with usbdebug feature enabled.
On this boot, what do you get for dmesg output on the phone side? Just
send the complete log or put it available for download without separate
If still nothing interesting appears, you could try coreboot with
spkmodem console and possibly POST display card, but I do not know how
to connect those on chromebox.
And.. last but not least, the instructions you followed, did they have a
step with 'make crossgcc'?
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