title: Green screen When calling PhotoCaptureDevice API on Windows Phone 8
body: <p>I don't know why, occasionally, my phone's camera will turning Green screen when calling PhotoCaptureDevice API, other camera apps and even build-in camera app all doesn't work, and then I have to restart the phone to fix the Green screen problem. In addtion, it should be noted there are no Exception was thrown out during the Green screen status. I searched this problem on Google.com, seemed that it's a WP8 OS fault.</p>
  
  <p>Here, I want to ask:
  1). Is there have a way to avoid or reduce the Green screen issue?
  2). Due to no Exception, how to detect the Green screen status programmatically? (Then I can show a message to remind user restart his phone.)</p>
  
  <p>Thank you!</p>