diff --git a/src/i830_crt.c b/src/i830_crt.c
index d8e4a76..a9a059a 100644
--- a/src/i830_crt.c
+++ b/src/i830_crt.c
@@ -286,6 +286,7 @@ i830_crt_detect_load (xf86CrtcPtr	    crtc,
     {
 	uint32_t	pipeconf = INREG(pipeconf_reg);
 	OUTREG(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER);
+	i830WaitForVblank (pScrn);
 	
 	st00 = pI830->readStandard (pI830, 0x3c2);
 	present = (st00 & (1 << 4)) != 0;