[coreboot] SeaBIOS, serial output, and grub

Kevin O'Connor kevin at koconnor.net
Fri May 1 04:39:31 CEST 2009

On Thu, Apr 30, 2009 at 10:26:56PM -0400, Kevin O'Connor wrote:
> What's really odd, is that if I have sgabios on, then grub does work
> okay.  I didn't catch this last night because I was also playing with
> sgabios at the same time.  As a guess, sgabios is reinitializing the
> serial port back to a way grub is okay with.  This may be specific to
> qemu, but it's something to look into.

Oops - if qemu/coreboot/seabios/sgabios/grub, then sgabios forwards
the grub screen over serial - grub itself still wont talk to the
serial directly.  (If I run qemu/seabios/sgabios/grub then I get two
copies of the grub messages - one from grub serial and one from grub
screen via sgabios.)


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