Comment 4 for bug 1682233

Although the kernel modesetting support for the GTX 1050 was introduced in the 4.8 kernel, the 3D acceleration support (required by Ubuntu's Unity desktop) has only recently arrived in DRM-Next and won't be available until the 4.12 kernel. See http://www.phoronix.com/scan.php?page=news_item&px=Nouveau-Pascal-Accel-Linux-4.12 I'm guessing XORG is looking for this and you won't need to force XORG to load its 'nouveau' module with the 4.12 kernel.

Unfortunately the 4.11 kernel isn't released yet.