The readout from xrandr after trying to go into suspend:

$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
eDP1 connected (normal left inverted right x axis y axis)
   1600x900       60.0 +   40.0  
VGA1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 
301mm
   1280x1024      60.0*+   75.0  
   1152x864       75.0  
   1024x768       75.1     60.0  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)

** Bug watch added: code.google.com/p/chromium-os/issues #28012
   http://code.google.com/p/chromium-os/issues/detail?id=28012

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-screensaver in Ubuntu.
https://bugs.launchpad.net/bugs/997433

Title:
  Window Manager Crashes after Locking the Screen While Laptop is Docked

Status in “gnome-screensaver” package in Ubuntu:
  New

Bug description:
  Details:

  1. Issue has been happening since 11.10, but same thing still happens in 
12.04.
  2. Hardware: HP EliteBook 8440p with Intel Graphics.
  3. Only happens when the system is docked, otherwise there is no issue.

  Steps to Reproduce:

  1. Go to "Brightness and Lock".
  2. Set the screen to turn off when inactive for 10 minutes (though timeframe 
doesn't seem to matter).
  3. Set "Lock screen after:" to "Screen turns off".
  4. Wait for the screen to dim and turn blank.
  5. Wait longer for the screen to power off completely.
  6. Wait another minute or so.
  7, The external monitor will start to flicker on-and-off for a bit.
  8. Try to unlock the screen.
  9. The screen will successfully unlock.
  10. Once unlocked you will see that your window manager (Compiz) has melted 
down.  You cannot resize windows, etc. because the title bars have all 
disappeared.
  11. I have found no way to recover from this issue short of a reboot (I 
usually get to a command terminal and try to shut it down as gracefully as I 
can).

  The only work-around to this issue is to set "Turn screen off when
  inactive for:" to "Never".  However, this is not ideal as it means the
  screen will always continue to suck battery even after the screen has
  been locked (even when not docked, unless I remember to change this
  setting every time I undock).

  I am assuming I cannot be the only one having this issue.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/997433/+subscriptions

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