<a href="http:&#x2F;&#x2F;i.imgur.com&#x2F;673Qw1i.jpg" rel="nofollow">http:&#x2F;&#x2F;i.imgur.com&#x2F;673Qw1i.jpg</a><p>As far as I know there&#x27;s a task running on the &quot;GPU&quot; (where quite a few things are assisting the ARM CPU showing the screen, playing audio, actually bootstrapping the ARM, ...) that provides this icon as a feedback to the user.