I just upgraded my Acer Iconia A1-810 tab to Android 4.4.2 Kitkat. I couldn't get root. I try to run the latest version of acer iconia toolkit under xubuntu 14.04 with usb-debugging on, but it says :
E: Couldn't connect to your Acer Iconia A1-810 / A1-811 / B1-711 / B1-720 over adb. Plug-In the device with USB-Debugging Mode turned on.
I tried other metods like towel root or framaroot as well, but nothing to do.
Could you help me find a way to get root on this tablet please ?