linux-kernel - [PATCH] [34/34] x86_64: ignore vgacon if hardware not present

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Date:	Mon, 30 Apr 2007 17:50:07 +0200 (CEST)
From:	Andi Kleen <ak@...e.de>
To:	kraxel@...e.de, alan@...rguk.ukuu.org.uk, patches@...-64.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] [34/34] x86_64: ignore vgacon if hardware not present


From: Gerd Hoffmann <kraxel@...e.de>

Avoid trying to set up vgacon if there's no vga hardware present.

Signed-off-by: Jeremy Fitzhardinge <jeremy@...source.com>
Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
Signed-off-by: Andi Kleen <ak@...e.de>
Cc: Alan <alan@...rguk.ukuu.org.uk>
Acked-by: Ingo Molnar <mingo@...e.hu>

---
 drivers/video/console/vgacon.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

===================================================================
Index: linux/drivers/video/console/vgacon.c
===================================================================
--- linux.orig/drivers/video/console/vgacon.c
+++ linux/drivers/video/console/vgacon.c
@@ -371,7 +371,8 @@ static const char *vgacon_startup(void)
 	}
 
 	/* VGA16 modes are not handled by VGACON */
-	if ((ORIG_VIDEO_MODE == 0x0D) ||	/* 320x200/4 */
+	if ((ORIG_VIDEO_MODE == 0x00) ||	/* SCREEN_INFO not initialized */
+	    (ORIG_VIDEO_MODE == 0x0D) ||	/* 320x200/4 */
 	    (ORIG_VIDEO_MODE == 0x0E) ||	/* 640x200/4 */
 	    (ORIG_VIDEO_MODE == 0x10) ||	/* 640x350/4 */
 	    (ORIG_VIDEO_MODE == 0x12) ||	/* 640x480/4 */
-
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