From 140f7b7fefc762ad6e8b5cb3b057a68fca640fd9 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@felloff.net>
Date: Mon, 12 Jan 2015 16:52:49 +0100
Subject: [PATCH] igfx: set the display/overlay/cursor plane override disbale
 bits for G45 (like bios)

---
 sys/src/cmd/aux/vga/igfx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/src/cmd/aux/vga/igfx.c b/sys/src/cmd/aux/vga/igfx.c
index 9bae6365b..35b8f0915 100644
--- a/sys/src/cmd/aux/vga/igfx.c
+++ b/sys/src/cmd/aux/vga/igfx.c
@@ -1004,6 +1004,10 @@ disablepipe(Igfx *igfx, int x)
 	csr(igfx, p->cur->cntr.a, 1<<5 | 7, 0);
 	csr(igfx, p->cur->base.a, ~0, 0);	/* arm */
 
+	/* display/overlay/cursor planes off */
+	if(igfx->type == TypeG45)
+		csr(igfx, p->conf.a, 0, 3<<18);
+
 	/* disable cpu pipe */
 	disabletrans(igfx, p);