diff -urN xf86-video-ati-orig/src/atipciids.h xf86-video-ati/src/atipciids.h
--- xf86-video-ati-orig/src/atipciids.h	2007-06-18 13:04:41.000000000 +0800
+++ xf86-video-ati/src/atipciids.h	2007-06-18 13:35:36.000000000 +0800
@@ -37,7 +37,7 @@
 #define PCI_VENDOR_ATI			0x1002
 #define PCI_VENDOR_AMD			0x1022
 #define PCI_VENDOR_DELL			0x1028
-
+#define PCI_VENDOR_SUN          0x108e
 /* ATI */
 #define PCI_CHIP_RV380_3150             0x3150
 #define PCI_CHIP_RV380_3151             0x3151
diff -urN xf86-video-ati-orig/src/radeon_display.c xf86-video-ati/src/radeon_display.c
--- xf86-video-ati-orig/src/radeon_display.c	2007-06-18 13:04:39.000000000 +0800
+++ xf86-video-ati/src/radeon_display.c	2007-06-18 13:45:21.000000000 +0800
@@ -1244,9 +1244,11 @@
       
     
     if (pRADEONEnt->PortInfo[0]->MonType == MT_UNKNOWN || pRADEONEnt->PortInfo[1]->MonType == MT_UNKNOWN) {
-	
-        if ((!pRADEONEnt->HasCRTC2) && (pRADEONEnt->PortInfo[0]->MonType == MT_UNKNOWN)) {
-	    if((pRADEONEnt->PortInfo[0]->MonType = RADEONDisplayDDCConnected(pScrn, DDC_DVI,
+        if(info->DefMonTypeDFP){
+            /*set monitor type to DFP and use hard-coded EDID in VBIOS to set mode*/
+            pRADEONEnt->PortInfo[0].MonType = MT_DFP;
+        } 
+        else if((pRADEONEnt->PortInfo[0]->MonType = RADEONDisplayDDCConnected(pScrn, DDC_DVI,
 									     pRADEONEnt->PortInfo[0])));
 	    else if((pRADEONEnt->PortInfo[0]->MonType = RADEONDisplayDDCConnected(pScrn, DDC_VGA,
 										  pRADEONEnt->PortInfo[0])));
diff -urN xf86-video-ati-orig/src/radeon_driver.c xf86-video-ati/src/radeon_driver.c
--- xf86-video-ati-orig/src/radeon_driver.c	2007-06-18 13:04:41.000000000 +0800
+++ xf86-video-ati/src/radeon_driver.c	2007-06-18 13:46:20.000000000 +0800
@@ -1550,6 +1550,7 @@
     info->IsIGP = FALSE;
     info->IsDellServer = FALSE;
     info->HasSingleDAC = FALSE;
+    info->DefMonTypeDFP= FALSE;
     switch (info->Chipset) {
     case PCI_CHIP_RADEON_LY:
     case PCI_CHIP_RADEON_LZ:
@@ -1560,6 +1561,11 @@
     case PCI_CHIP_RN50_515E:  /* RN50 is based on the RV100 but 3D isn't guaranteed to work.  YMMV. */
     case PCI_CHIP_RN50_5969:
         pRADEONEnt->HasCRTC2 = FALSE;
+        if ((info->PciInfo->subsysVendor == PCI_VENDOR_SUN) &&
+            (info->PciInfo->subsysCard  == 0x4133)){
+            info->DefMonTypeDFP = TRUE;
+            xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Sun server detected, force default monitor type to DFP\n");
+        }
     case PCI_CHIP_RV100_QY:
     case PCI_CHIP_RV100_QZ:
 	info->ChipFamily = CHIP_FAMILY_RV100;
diff -urN xf86-video-ati-orig/src/radeon.h xf86-video-ati/src/radeon.h
--- xf86-video-ati-orig/src/radeon.h	2007-06-18 13:04:40.000000000 +0800
+++ xf86-video-ati/src/radeon.h	2007-06-18 13:35:36.000000000 +0800
@@ -450,6 +450,8 @@
     Bool              ddc_mode;         /* Validate mode by matching exactly
 					 * the modes supported in DDC data
 					 */
+    Bool              DefMonTypeDFP;    /* set default monitor type as DFP and use hard-coded EDID in VBIOS 
+                                           set mode*/
     Bool              R300CGWorkaround;
 
 				/* EDID or BIOS values for FPs */