I'm on linux, ubuntu 18 with a 750gtx , 12gb ram, a ssd and a phenom 2 x4 955. On 1.3 I used to easily get 60 fps, with the exception of the underworld. Now the game tanks to 20, 30 fps at a times and framerate is unstable in general. If I minimize the game and refocus it, then it improves. The...