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The USB port can't power the display and charge at the same time. It will charge, but only with the screen off.
 
I installed an app on my laptop to force my usb port to charge my iPad. It's called ASUS Ai charger. It works fine on my Sony Vaio.
 
Kind of annoying, and it doesn't tell you why it doesnt charge.😕

The iPad is a swimming pool and your USB connection is a garden hose. As long as the screen is on the drain is partially open and will empty about as fast as water goes in. Close the drain and it will fill slowly. If you want to fill it up fast you need to connect it to a fire hose (the supplied iPad 10W wart).
 
Kind of annoying, and it doesn't tell you why it doesnt charge.😕

Google and download "Asus AI Charger"

It's a little app that runs in the taskbar, that enables the iPad to charge over USB.

NB-it doesn't matter what motherboard you have.
 
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