I have a 10.1 GT-P7510. It works fine except when I plug in the power supply and try to use it, the screen will freeze. If I unplug it, it will work. Since I use the tablet as an electronic flight book when I fly, I like to have it charging while running a moving map application. I cannot do that with this problem. I have tried two different charging systems and it happens with both. Any one else have this issue?