title: Turning on screen programmatically
body: <p>I would like to unlock screen and switching it on to show a popup on an event trigger. I am able to unlock the screen using</p>
  
  <pre><code>newKeyguardLock = km.newKeyguardLock(HANDSFREE);
  newKeyguardLock.disableKeyguard();
  </code></pre>
  
  <p>on <code>KeyGuardService</code> but I cannot turn on the screen. I am using</p>
  
  <pre><code>wl = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, HANDSFREE);
  wl.acquire();
  </code></pre>
  
  <p>but with no success. The screen still remains off.
  How can I achieve this?</p>