On 17.10.2013 19:45, John Lewis wrote:
Hello again coreboot folks,
I am trying to get the subject working with coreboot, and I can't seem
to get any display, either with SeaBIOS or Grub2 payloads (although
Grub2 does switch backlight on). I have output from USB debug, but the
only obvious problem is not being able to write the MRC cache (which
also happens on Lumpy and doesn't stop it from booting). Additionally
there isn't any debug output from the payloads. How do I enable same,
and have you any other thoughts as to how to move things forward? Please
see attached.
Kind Regards,
John.
Hi
That log was with SeaBIOS? With it one usually executes video bios late.
With Grub2 video bios is usually executed early, before payload.
Your log indicates it did not even reach payload. Try to add some
debugging printk's in smbios_write_tables() to trace where it might
halt. Unfortunately you cannot yet use GDB over usbdebug.
Grub2 console over Net20DC has been demonstrated, it may require some
tweaks to USB IDs/descriptors to make it work with BeagleBone Black.
Kyösti
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