I can also confirm this bug. Moreover, the nouveau driver does not have
this bug. Can I help fixing it somehow?

You received this bug notification because you are a member of Desktop
Packages, which is subscribed to nvidia-graphics-drivers-367 in Ubuntu.

  Display backlight won't turn on after screen timeout

Status in nvidia-graphics-drivers-367 package in Ubuntu:

Bug description:
  Using nVidia driver 367.44 on Skylake Intel Processors, with 1000
  series graphics, the backlight won't turn on after turned off by gnome
  session idle delay (org.gnome.desktop.session idle-delay). or by `xset
  dpms force off`

  Resume from suspend is unaffected.

  This is on a clean install of 16.10 with the 367.44 nVidia driver.
  This is a regression from the 367.35 driver.  367.48 and 370.28 also
  exhibit this behavior.

  This is confirmed on the following hardware:

  Oryx Pro 2 (oryp2) i7-6700HQ with 1070
  Serval 10 (serw10) i7-6700 with 1060
  Bonobo 11 (bonw11) i7-6700K with dual 1070

  Steps to reproduce:

  1. Install a fresh image of Yakkety and 367.44 from the graphics driver 
team's PPA.
  2. Log in to Unity shell
  3. Lock screen and wait for dimming.
  4. Move the mouse to 'resume'
  5. The screen will turn on, but the backlight is still off

  The current workaround:

  1. Hit tty1 (Ctrl+Alt+F1)
  2. Hit tty7 (Ctrl+Alt+F7)

  This will bring Unity back to life.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: nvidia-367 367.44-0ubuntu3
  ProcVersionSignature: Ubuntu 4.8.0-19.21-generic 4.8.0-rc8
  Uname: Linux 4.8.0-19-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.3-0ubuntu7
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Oct  6 16:17:11 2016
  SourcePackage: nvidia-graphics-drivers-367
  UpgradeStatus: No upgrade log present (probably fresh install)

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