Enabiling nvidia drivers thru nvidia-prime doesn't survive a reboot

[Doug McMahon]

Test Case here:
Seen on both 660m & 775m laptops, both with ssd's

Fresh install of 16.04.1
Fully updated

Install the nvidia-361 package
Reboot
What happens: boots to Intel drivers

Open nvidia settings > prime profiles > pick nvidia
log out/in
What happens: log in uses Nvidia drivers
Reboot
What happens: boots to Intel

Attaching gpu-manager.log which reflects immediately above scenario

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-drivers-common 1:0.4.17.2
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Oct 7 15:35:17 2016
InstallationDate: Installed on 2016-10-07 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: ubuntu-drivers-common
UpgradeStatus: No upgrade log present (probably fresh install)

[Doug McMahon (mc3man)]

This behavior does not occur if I downgrade to _0.4.17
i.e. downgrade, restart, switch to nvidia, log out/in, restart

[Doug McMahon (mc3man)]

After updating back to current versions & 2 reboots happens again. Below logs reflect 2nd boot
(doesn't load nvidia, goes back to intel