diff -urN ../linux-2.6.25-orig/drivers/video/tdfxfb.c drivers/video/tdfxfb.c
--- ../linux-2.6.25-orig/drivers/video/tdfxfb.c	2008-04-17 11:49:44 +0900
+++ drivers/video/tdfxfb.c	2008-05-19 02:51:39 +0900
@@ -485,7 +485,7 @@
 	var->xres = (var->xres + 15) & ~15; /* could sometimes be 8 */
 	lpitch = var->xres * ((var->bits_per_pixel + 7) >> 3);
 
-	if (var->xres < 320 || var->xres > 2048) {
+	if (var->xres < 256 || var->xres > 2048) {
 		DPRINTK("width not supported: %u\n", var->xres);
 		return -EINVAL;
 	}