Re: GT555M/2GB (10de:1247) question
By the way, having the PCI ID not marked as supported in the README won't prevent you from using the driver. I took a closer look at your logs and it doesn't look like you specified a BusID for the NVIDIA device in your xorg.conf. If you don't specify one, the X Server will try to drive the first VGA device by default, which here is the Intel GPU in your notebook. In the Device section of the /etc/X11/xorg.conf.d/20-nvidia.conf file, please try adding a BusID line pointing at your NVIDIA VGA device (as reported by lspci), eg.:
That should allow you to start X correctly with the NVIDIA driver with 290.10, so you don't have to wait for a release. Make sure the NVIDIA device is selected in the system BIOS, or it might not be able to drive your display.