Obviously this is not upstreamable...

diff -up linux-3.7.5-202.fc18.x86_64/drivers/gpu/drm/i915/intel_display.c.jx linux-3.7.5-202.fc18.x86_64/drivers/gpu/drm/i915/intel_display.c
--- linux-3.7.5-202.fc18.x86_64/drivers/gpu/drm/i915/intel_display.c.jx	2013-01-30 12:03:28.000000000 -0500
+++ linux-3.7.5-202.fc18.x86_64/drivers/gpu/drm/i915/intel_display.c	2013-01-30 12:40:53.177449368 -0500
@@ -6925,6 +6925,11 @@ intel_modeset_check_state(struct drm_dev
 	struct intel_encoder *encoder;
 	struct intel_connector *connector;
 
+	/* oh hush */
+	extern int i915_in_tv_detect;
+	if (i915_in_tv_detect)
+		return;
+
 	list_for_each_entry(connector, &dev->mode_config.connector_list,
 			    base.head) {
 		/* This also checks the encoder/connector hw state with the
diff -up linux-3.7.5-202.fc18.x86_64/drivers/gpu/drm/i915/intel_tv.c.jx linux-3.7.5-202.fc18.x86_64/drivers/gpu/drm/i915/intel_tv.c
--- linux-3.7.5-202.fc18.x86_64/drivers/gpu/drm/i915/intel_tv.c.jx	2012-12-10 22:30:57.000000000 -0500
+++ linux-3.7.5-202.fc18.x86_64/drivers/gpu/drm/i915/intel_tv.c	2013-01-30 12:39:34.318593585 -0500
@@ -1296,6 +1296,8 @@ static void intel_tv_find_better_format(
 		connector->dev->mode_config.tv_mode_property, i);
 }
 
+int i915_in_tv_detect = 0;
+
 /**
  * Detect the TV connection.
  *
@@ -1314,11 +1316,15 @@ intel_tv_detect(struct drm_connector *co
 	if (force) {
 		struct intel_load_detect_pipe tmp;
 
+		i915_in_tv_detect = 1;
 		if (intel_get_load_detect_pipe(connector, &mode, &tmp)) {
 			type = intel_tv_detect_type(intel_tv, connector);
 			intel_release_load_detect_pipe(connector, &tmp);
-		} else
+			i915_in_tv_detect = 0;
+		} else {
+			i915_in_tv_detect = 0;
 			return connector_status_unknown;
+		}
 	} else
 		return connector->status;