--- linux-2.4.22pre5/include/linux/agp_backend.h~	2003-07-12 14:36:54.000000000 +0700
+++ linux-2.4.22pre5/include/linux/agp_backend.h	2003-07-12 14:36:54.000000000 +0700
@@ -66,6 +66,7 @@
 	VIA_APOLLO_KM266,
 	VIA_APOLLO_KT400,
 	VIA_APOLLO_P4M266,
+	VIA_APOLLO_P4X400,
 	SIS_GENERIC,
 	AMD_GENERIC,
 	AMD_IRONGATE,
--- linux-2.4.22pre5/drivers/char/drm-4.0/agpsupport.c~	2003-07-12 14:36:59.000000000 +0700
+++ linux-2.4.22pre5/drivers/char/drm-4.0/agpsupport.c	2003-07-12 14:36:59.000000000 +0700
@@ -278,6 +278,7 @@
 		case VIA_APOLLO_KT400:  head->chipset = "VIA Apollo KT400";
 			break;
 		case VIA_APOLLO_P4X400:	head->chipset = "VIA Apollo P4X400";
+			break;
 #endif
 
 		case VIA_APOLLO_PRO: 	head->chipset = "VIA Apollo Pro";