i'm sorry, i wouldn't be able to help you, but i need your help, i bought the same model of dell, but after some sort of automatic update to ubuntu it lost its wifi drivers and i couldn't be able to fix it, so i install win 7 on it, but i want ubuntu back on it, so i install ubuntu 14 with amd but it comes up with an error of "low grachic mode" i don't know why,

So i need a suggestion, which ubuntu version should i install on it to run things smoothly.