I’m sorry for mistakes: English is not my native language.
I have a notebook CLEVO W150ER with NVIDIA GeForce 650M. I’d bought it when NVIDIA announced the official NVIDIA Optimus technology support for Linux. It was Ubuntu 12.04.3 installed on it’s notebook. To enable NVIDIA PRIME, I’d upgraded it to 12.04.4 and run:
sudo apt-get install --install-recommends linux-generic-lts-sausy xserver-xorg-lts-sausy libgl1-mesa-glx-lts-sausy
I’d enabled ppa:graphics-drivers to get updates for the NVIDIA driver. When NVIDIA 361.xx released, it stopped to work. The operation system starting, but I see blank screen. It seems that xrandr command didn’t work properly.
In NVIDIA 364.xx there was updated requirements to the Linux kernel for NVIDIA PRIME. Now it’s 3.13, but 12.04.4 have 3.11 kernel. I’d upgraded it to 12.04.5 and 3.13. But it still not working.
If I move my HDD to another notebook with NVIDIA GeForce 740M, NVIDIA PRIME is working. So it’s not an operation system bug, it’s in NVIDIA driver. Xrandr doesn’t work properly on 650M but it’s working on 740M