1)
Does Hashem sleep?!
1.
Ibn Ezra #1, Radak, Malbim: When You do not turn to us and see our afflictions, it is as if You sleep and do not see.
2.
Ibn Ezra #2: The enemy says that You sleep.
2)
What is the meaning of Hashem awakening?
1.
Radak: If for many years You were like one who sleeps (You did not turn to us), from now, waken (see our afflictions); "do not abandon us forever."