Open http://www.communitymx.com/content/source/E5141/wmodeopaque.htm on a Sun Ray (xBGR display) and RENDER off. Got a black rectangle. The problem is gone if ipc is turned off.
Created attachment 587615 [details] [diff] [review] patch Does it look correct? With xBGR display, FindVisual returns null for RGB24. Then it will get to NS_ERROR("Need X falback surface, but visual failed");
Comment on attachment 587615 [details] [diff] [review] patch Makes sense to me.