--- radeon_driver.c-orig	2007-04-23 10:17:04.000000000 +0800
+++ radeon_driver.c	2007-04-23 10:26:35.000000000 +0800
@@ -3329,10 +3329,13 @@
 	first = last = ddcModes = RADEONDDCModes(pScrn);
 
 	for (p = ddcModes; p; p = p->next) {
+	
+	    /* If primary head is a flat panel, use RMX by default, 
+		however, IBM Lewis server has some trouble to deal with the on-chip RMX modes,
+		don't use RMX for it */
 
-	    /* If primary head is a flat panel, use RMX by default */
 	    if ((!info->IsSecondary && DisplayType != MT_CRT) &&
-		(!info->ddc_mode) && (!crtc2)) {
+		 (!info->ddc_mode) && (!crtc2) && (!info->IsIBMServer) ) {
 		/* These values are effective values after expansion.
 		 * They are not really used to set CRTC registers.
 		 */
@@ -3914,6 +3917,7 @@
     RADEONEntPtr pRADEONEnt = RADEONEntPriv(pScrn);
     char           *s;
 
+	struct vendor *ven;
     /* This option has two purposes:
      *
      * 1. For CRT, if this option is on, xf86ValidateModes (to
@@ -4099,6 +4103,18 @@
 	    xf86DeleteMode(&pScrn->modes, pScrn->modes);
 	while (pScrn->modePool)
 	    xf86DeleteMode(&pScrn->modePool, pScrn->modePool);
+ 
+	/*we add extra code to detect a IBM Lewis server
+	 on-chip RMX mode will be disabled for this machine*/
+	if(info->ChipFamily == CHIP_FAMILY_RV100 && !info->HasCRTC2)
+	{
+		
+	ven=&pRADEONEnt->PortInfo[0].MonInfo->vendor;
+  	
+    if(ven->prod_id == 0x29a && ven->serial == 0x1010101u) {
+			 info->IsIBMServer= TRUE;
+		}
+	}
 
 	/* Next try to add DDC modes */
 	modesFound = RADEONValidateDDCModes(pScrn, pScrn->display->modes,
@@ -4145,7 +4161,7 @@
 					  pScrn->display->virtualY,
 					  info->FbMapSize,
 					  LOOKUP_BEST_REFRESH);
-		else if (!info->IsSecondary)
+		else if (!info->IsSecondary && !info->IsIBMServer)
 		    modesFound = RADEONValidateFPModes(pScrn, pScrn->display->modes);
 	    }
         }
--- radeon.h-orig	2007-04-23 10:22:24.000000000 +0800
+++ radeon.h	2007-04-23 10:23:07.000000000 +0800
@@ -703,7 +703,10 @@
 
     /* special handlings for DELL triple-head server */
     Bool		IsDellServer; 
-
+    
+	/* special handlings for IBM Levis server */
+	Bool		IsIBMServer;
+	
     /* enable bios hotkey output switching */
     Bool		BiosHotkeys;