On 17/10/2013 19:49, Kyösti Mälkki wrote:
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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From the log I just sent it looks as though the missing INT15 function
is probably the biggest problem?
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