Hi,
as per Kevin`s suggestion, I am posting initialization log (mixed one)
from initialization of the GeodeLX board. As it could be clearly seen
from the log, VGA option ROM was never called and executed during the
initialization sequence, therefore issue with a lack of video output
during SeaBIOS stage on this board looks somehow logical. [1] suggests
that the problem existed long before, as most users of these boards
are Alix owners who do not care about existence of the video output :)
[1].
https://www.coreboot.org/pipermail/seabios/2012-February/003186.html