Re: [Xen-devel] [PATCH 7/7] vgabios: Make Windows 8 support greater resolutions

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2012-05-04 at 13:36 +0100, Frediano Ziglio wrote:
> Apparently Windows 8 refuse to use any mode if has more than one page.

What about OSes other than Windows 8? Did you test with any of them?

> 
> Signed-off-by: Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
> ---
>  tools/firmware/vgabios/vbe.c |    6 +++---
>  1 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/firmware/vgabios/vbe.c b/tools/firmware/vgabios/vbe.c
> index a7b06b9..9131721 100644
> --- a/tools/firmware/vgabios/vbe.c
> +++ b/tools/firmware/vgabios/vbe.c
> @@ -946,9 +946,9 @@ Bit16u *AX;Bit16u CX; Bit16u ES;Bit16u DI;
>                      (size_64k > totalMemory))
>                    info.ModeAttributes &= ~VBE_MODE_ATTRIBUTE_SUPPORTED;
>  
> -                if (using_lfb) {
> -                  info.NumberOfBanks = 1;
> -                }
> +                /* Windows 8 require this to be 1! */
> +                info.NumberOfBanks = 1;
> +
>                  if (info.WinAAttributes & VBE_WINDOW_ATTRIBUTE_RELOCATABLE) {
>                    info.WinFuncPtr = 0xC0000000UL;
>                    *(Bit16u *)&(info.WinFuncPtr) = 
> (Bit16u)(dispi_set_bank_farcall);



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