diff -urN ../linux-2.6.23-orig/drivers/video/tdfxfb.c drivers/video/tdfxfb.c
--- ../linux-2.6.23-orig/drivers/video/tdfxfb.c	2007-10-10 05:31:38 +0900
+++ drivers/video/tdfxfb.c	2007-11-19 14:43:19 +0900
@@ -498,7 +498,7 @@
 	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;
 	}