From f12e6877945e8c224ce143983a74697a03fbfeb9 Mon Sep 17 00:00:00 2001
From: Lubomir Rintel <lkundrak@v3.sk>
Date: Mon, 10 May 2010 09:25:55 +0200
Subject: [PATCH] Handle startup without monitor attached more gracefully

Refuse to configure a screen which has no valid modes. Otherwise X server
would crash attempting to dereference to modes list later on.
---
 src/nv_driver.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/src/nv_driver.c b/src/nv_driver.c
index 795859f..aed24f7 100644
--- a/src/nv_driver.c
+++ b/src/nv_driver.c
@@ -794,6 +794,10 @@ NVPreInit(ScrnInfoPtr pScrn, int flags)
 						     pScrn->depth);
 	}
 
+	/* No usable mode */
+	if (!pScrn->modes)
+		return FALSE;
+
 	/* Set the current mode to the first in the list */
 	pScrn->currentMode = pScrn->modes;
 
-- 
1.6.5.2