How do I keep my Android 4.0.3 phone awake when USB connected?
I have checked on my two Ice Cream Sandwich Devices (Stock Xoom and Droid 3 running CM9 Beta). I have, under Settings &gt; Developer Options a Stay Awake option. Which keeps your device awake when charging.



This will work if your device charges over USB (my Xoom does not, for instance).

However, should this option not be there, we can turn to apps for help!

StayAwake looks like it could be a solution to your problem.

WakeLocker for Galaxy S also looks to be a solution.