From e742aeb28c7d9d6e75932c408bcc7c44af52e303 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alex@samba.(none)>
Date: Tue, 19 Sep 2006 13:45:33 -0400
Subject: fix large negative refresh rates with mergedfb (Henry Zhao) fixes bug
 6966

---
 src/radeon_mergedfb.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src')

diff --git a/src/radeon_mergedfb.c b/src/radeon_mergedfb.c
index 313dda24..6f3288f0 100644
--- a/src/radeon_mergedfb.c
+++ b/src/radeon_mergedfb.c
@@ -212,6 +212,12 @@ RADEONCopyModeNLink(ScrnInfoPtr pScrn, DisplayModePtr dest,
     mode->VSyncEnd += dy;
     mode->VTotal += dy;
 
+    /* This is needed for not generating negative refesh rates in xrandr with the
+       faked DotClock below
+     */
+    if (!(mode->VRefresh))
+        mode->VRefresh = mode->Clock * 1000.0 / mode->HTotal / mode->VTotal;
+
      /* Provide a sophisticated fake DotClock in order to trick the vidmode
       * extension to allow selecting among a number of modes whose merged result
       * looks identical but consists of different modes for CRT1 and CRT2
-- 
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