My auto-rotation and sensors was working fine in my Xperia Arc S with Gingerbread, but when I updated it to Ice Cream Sandwich via Sony PC Companion, now the auto-rotation and some sensors are not working. I have also checked it by reflashing the other custom ROM, but same problem exists there. I guess its a Sony's built-in bugs, because I have also checked other Xperia Arc S with ICS, same issues exists there. Any help in this regards will be highly appreciated! Please help me how to fix it, or any other alternate to auto-rotation and how to turn off proximity sensor manually.