[SeaBIOS] [PATCH] cbvga_set_mode: refine clear display logic

[Gerd Hoffmann]

On Tue, Jun 26, 2018 at 09:27:03AM +0200, Paul Menzel wrote:
> Dear Gerd,
> 
> 
> Am 26.06.2018 um 09:21 schrieb Gerd Hoffmann:
> > There is no need to skip text mode clearing.
> > Clearing the framebuffer should be safe on legacy calls too.
> 
> How did you test this?

CONFIG_DISPLAY_BOCHS=y

Then qemu from master branch, configure display this way:

   -vga none -device bochs-display,romfile=/path/to/vgabios.bin

And boot a windows 10 install iso, see if it boots up properly with
working display.

cheers,
  Gerd