1 files changed, 29 insertions, 0 deletions
diff --git a/system/xen/patches/xsa179-qemuu-4.6-0004-vga-update-vga-register-setup-on-vbe-changes.patch b/system/xen/patches/xsa179-qemuu-4.6-0004-vga-update-vga-register-setup-on-vbe-changes.patch
new file mode 100644
index 0000000000..0638edb91b
--- /dev/null
+++ b/system/xen/patches/xsa179-qemuu-4.6-0004-vga-update-vga-register-setup-on-vbe-changes.patch
@@ -0,0 +1,29 @@
+From ef8bd1b26a597ae7c306227655626640093cb7a2 Mon Sep 17 00:00:00 2001
+From: Gerd Hoffmann <kraxel@redhat.com>
+Date: Tue, 26 Apr 2016 15:39:22 +0200
+Subject: [PATCH 4/5] vga: update vga register setup on vbe changes
+
+Call the new vbe_update_vgaregs() function on vbe configuration
+changes, to make sure vga registers are up-to-date.
+
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
+---
+ hw/display/vga.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/hw/display/vga.c b/hw/display/vga.c
+index fb822f4..3739758 100644
+--- a/hw/display/vga.c
++++ b/hw/display/vga.c
+@@ -762,6 +762,7 @@ void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val)
+         case VBE_DISPI_INDEX_Y_OFFSET:
+             s->vbe_regs[s->vbe_index] = val;
+             vbe_fixup_regs(s);
++            vbe_update_vgaregs(s);
+             break;
+         case VBE_DISPI_INDEX_BANK:
+             val &= s->vbe_bank_mask;
+-- 
+1.9.1
+