Good day to you all.
The newest AMD drivers (crimson) cause marquee tool in maya to fail. I cannot select any polygon in the viewport. Rolled back to the 15.11 beta 3 drivers, and everything went back to normal.
I hope this message will lead to a fix in the next driver versions
Just so you know, my rig is as follows :
AMD FURY X
Intel Skylake i7 6700K
Ripjaw V 32 Go
Asus Maximus VIII gene