Index: git/src/i830_display.c
===================================================================
--- git.orig/src/i830_display.c	2008-10-29 15:46:24.000000000 +0000
+++ git/src/i830_display.c	2008-10-29 18:27:47.000000000 +0000
@@ -376,7 +376,7 @@
 i830WaitForVblank(ScrnInfoPtr pScreen)
 {
     /* Wait for 20ms, i.e. one cycle at 50hz. */
-    usleep(30000);
+    usleep(21000);
 }
 
 void