[Xen-changelog] [xen-unstable] vgabios: Make Windows 8 support greater resolutions

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
# Date 1336394367 -3600
# Node ID 8f1e0cc4a507a52a49a2eb7832a57ecc7e032dce
# Parent  5097d77b057b7cb4ccf6d05923a960b562a74d03
vgabios: Make Windows 8 support greater resolutions

Apparently Windows 8 refuse to use any mode if has more than one page.

Signed-off-by: Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
Committed-by: Keir Fraser <keir@xxxxxxx>
---


diff -r 5097d77b057b -r 8f1e0cc4a507 tools/firmware/vgabios/vbe.c
--- a/tools/firmware/vgabios/vbe.c      Mon May 07 13:38:57 2012 +0100
+++ b/tools/firmware/vgabios/vbe.c      Mon May 07 13:39:27 2012 +0100
@@ -944,9 +944,9 @@ Bit16u *AX;Bit16u CX; Bit16u ES;Bit16u D
                     (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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