Hello, I have a big problem with my Oculus. As soon as I start a game, I only see black, but I hear sounds. The log: [Service_2017-12-26_12.54.12.txt] 26/12 12:59:06.322 {!ERROR!} [Kernel:Default] [DisplayManager] NVidia power mode default not settable because another instance has it set. Please help!