Public bug reported:

[Impact]
In Precise and Saucy, we support hybrid graphics, but this issue prevents users 
from hotplugging external screens (the ones connected to the Intel card if 
nvidia is driving the display). The timestamps on the main screen are never 
updated when a output is plugged in to the gpu screen.

This is also the bug for getting xorg-server 1.14.5 backported to saucy.

[Test Case]
Requires fix for #1224254 first.

Plug in a screen after gsd started. The screen should turn on and enter
mirror mode or extended mode. Wrong behavior: Screen stays off.

[Regression Potential]
Low, but not zero. We will also bump the micro release with the MRE, the ABI 
was been broken shortly after 1.14.4, but this was quickly discovered and fixed 
before 1.14.5rc1 was released. There's also a commit "xfree86: Find primary 
entity when bus types are nominally different" which I suspect could have 
broken driver loading in the optimus configuration, but we already have a 
different fix because I ran into the same bug after a similar fix before.

** Affects: xorg-server (Ubuntu)
     Importance: High
     Assignee: Maarten Lankhorst (mlankhorst)
         Status: In Progress

** Affects: xorg-server (Ubuntu Saucy)
     Importance: Undecided
         Status: New

** Package changed: xserver-xorg-video-modesetting (Ubuntu) => xorg-
server (Ubuntu)

** Changed in: xorg-server (Ubuntu)
       Status: New => In Progress

** Changed in: xorg-server (Ubuntu)
     Assignee: (unassigned) => Maarten Lankhorst (mlankhorst)

** Changed in: xorg-server (Ubuntu)
   Importance: Undecided => High

** Also affects: xorg-server (Ubuntu Saucy)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1259561

Title:
  config timestamps not updated on hotplugging a output with hybrid
  graphics

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