[SeaBIOS] [RFC PATCH] VGA BIOS init fails if first mode used is graphical

David Woodhouse dwmw2 at infradead.org
Wed Feb 13 11:10:34 CET 2013


On Wed, 2013-02-13 at 10:44 +0100, Fred . wrote:
> Can SeaBIOS init to a high resolution video mode such as 1920x1200?

I'm not entirely sure what you're asking. Can SeaVGABIOS initialise a
high-resolution mode? Yes. It supports 1920x1200 and 2560x1600 modes.
All you have to do is call INT 10h with the appropriate mode-setting
request.

Or are you asking if it can do so *power-up*, setting a graphical mode
so that nothing displays as expected, because operating systems and
bootloaders expect the screen to be in *text* mode? To which the answer
would be that yes it *can* be patched to do so, but that would be bad.

Or are you asking if it can do so for the OVMF/CSM case? In which case
again it *could* but OVMF is about to set the mode for itself anyway so
it would be pointless.

-- 
dwmw2

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