If I want to suspend using the keyboard, I do the following:
1. Press Window-F10.
2. Press Right until I get to the corner menu.
3. Press Down until I get to the lock icon at the bottom.
4. Press Right once to get on the power button.
5. Press Alt to change the power button to the suspend button.

If I do those in that order, the keyboard highlight is gone, and I have to either press Escape and start over, or use the mouse. The same happens if I do step 5 before step 4, but then release the Alt after going to the suspend button. I should be able to first navigate to the power/suspend button and then hold Alt only while I press the final Enter.