Index: i915_irq.c
===================================================================
RCS file: /cvs/dri/drm/shared-core/i915_irq.c,v
retrieving revision 1.16
diff -u -r1.16 i915_irq.c
--- i915_irq.c	25 Mar 2006 07:16:14 -0000	1.16
+++ i915_irq.c	15 Jun 2006 07:07:17 -0000
@@ -45,7 +45,7 @@
 
 	temp = I915_READ16(I915REG_INT_IDENTITY_R);
 
-	temp &= (USER_INT_FLAG | VSYNC_PIPEA_FLAG);
+	temp &= (USER_INT_FLAG | VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG);
 
 	DRM_DEBUG("%s flag=%08x\n", __FUNCTION__, temp);
 
@@ -59,7 +59,7 @@
 	if (temp & USER_INT_FLAG)
 		DRM_WAKEUP(&dev_priv->irq_queue);
 
-	if (temp & VSYNC_PIPEA_FLAG) {
+	if (temp & (VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG)) {
 		atomic_inc(&dev->vbl_received);
 		DRM_WAKEUP(&dev->vbl_queue);
 		drm_vbl_send_signals(dev);
@@ -197,7 +197,7 @@
 {
 	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
 
-	I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG | VSYNC_PIPEA_FLAG);
+	I915_WRITE16(I915REG_INT_ENABLE_R, USER_INT_FLAG | VSYNC_PIPEA_FLAG | VSYNC_PIPEB_FLAG);
 	DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
 }