Hi: Asus have an update driver that allows you to charge the ipad by usb. I have installed in my PC and Laptop and is working. I think is generic, because my PC is Packard Bell and my Laptop Acer, and is charging in both. (Sorry for my English, I'm from Spain.) This is the link to download the driver. Remember, the driver ASUS for PC and Laptops. http://www.mydigitallife.info/2010/...update-solution-for-asus-and-msi-windows-pcs/ I have tested and with the screen on, the charge in 15 minutes is 5% and with the screen off is 10%.