--- xc/programs/Xserver/hw/xfree86/drivers/ati/atipreinit.c.orig	2003-11-20 21:59:07.000000000 -0800
+++ xc/programs/Xserver/hw/xfree86/drivers/ati/atipreinit.c	2004-05-08 14:21:05.000000000 -0700
@@ -1918,12 +1918,12 @@
                    VBlankEnd += 0x0100U;
 
                 pATI->LCDHBlankWidth = HBlankEnd - HBlankStart;
-                pATI->LCDHSyncStart = HSyncStart - HBlankStart - 1;
-                pATI->LCDHSyncWidth = HSyncEnd - HSyncStart;
+                pATI->LCDHSyncStart = HSyncStart - HBlankStart;
+                pATI->LCDHSyncWidth = HSyncEnd - HSyncStart - 1;
 
                 pATI->LCDVBlankWidth = VBlankEnd - VBlankStart;
-                pATI->LCDVSyncStart = VSyncStart - VBlankStart - 1;
-                pATI->LCDVSyncWidth = VSyncEnd - VSyncStart;
+                pATI->LCDVSyncStart = VSyncStart - VBlankStart;
+                pATI->LCDVSyncWidth = VSyncEnd - VSyncStart - 1;
 
                 HDisplay = HTotal + 5 - pATI->LCDHBlankWidth;
                 VDisplay = VTotal + 2 - pATI->LCDVBlankWidth;