additional info:  The following actions work normally on the command
line:

sudo pm-suspend     <-- suspends the system, wakes up normally
sudo pm-hibernate  <-- hibernates the system, wakes up as intended (with a few 
manual tweaks in the initrd image to get it working with encrypted-swap)

pm-is-supported --suspend returns true
pm-is-supported --hibernate returns true
pm-is-supported --suspend-hybrid returns false (but noone uses that anyway)


** Description changed:

  When the power button on a laptop is pressed while the unity desktop
  (more specifically gnome-settings-daemon) is running, the ACPI handler
- ignores the event. Instead gnome-settings-daemon btings up a "popup" to
+ ignores the event. Instead gnome-settings-daemon brings up a "popup" to
  ask the user whether he wants to
  
  Suspend
  Restart
  Cancel
  Shutdown
  
  and if the hibernate function has been enabled according to
  http://askubuntu.com/questions/94754/how-to-enable-hibernation
  
  also
  
  Hibernate
  
  if no action is taken, the "Shutdown" feature is auto-executed abter 60
  seconds.
  
  Of these, only "Shutdown" and "Cancel" always have the intended effect,
  where "Shutdown" invokes a shutdown of the system and "Cancel" simply
  closes the dialog.
  
  "Restart" causes a system restart in about 99% of the cases only,
  however I had seen occasions where only the session got terminated and
  the login screen is presented without an actual reboot taking place!
  
  "Suspend" and "Hibernate" have NO effect, other than the dialog closes,
  in fact they behave the same as if "Cancel" has been pressed!
  
- 
- When "Suspend" or "Hibernate" are selected manually in the power menu from 
the Unity desktop, they both work. In fact all options in that menu work.
+ When "Suspend" or "Hibernate" are selected manually in the power menu
+ from the Unity desktop, they both work. In fact all options in that menu
+ work.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: gnome-settings-daemon 3.4.2-0ubuntu14
  ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
  Uname: Linux 3.5.0-18-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  Date: Sun Nov 18 14:09:45 2012
  EcryptfsInUse: Yes
  MarkForUpload: True
  SourcePackage: gnome-settings-daemon
  UpgradeStatus: No upgrade log present (probably fresh install)

** Description changed:

  When the power button on a laptop is pressed while the unity desktop
  (more specifically gnome-settings-daemon) is running, the ACPI handler
  ignores the event. Instead gnome-settings-daemon brings up a "popup" to
  ask the user whether he wants to
  
  Suspend
  Restart
  Cancel
  Shutdown
  
  and if the hibernate function has been enabled according to
  http://askubuntu.com/questions/94754/how-to-enable-hibernation
  
  also
  
  Hibernate
  
  if no action is taken, the "Shutdown" feature is auto-executed abter 60
  seconds.
  
  Of these, only "Shutdown" and "Cancel" always have the intended effect,
  where "Shutdown" invokes a shutdown of the system and "Cancel" simply
  closes the dialog.
  
  "Restart" causes a system restart in about 99% of the cases only,
  however I had seen occasions where only the session got terminated and
  the login screen is presented without an actual reboot taking place!
+ (Edit: I can't reproduce that reliably, might be a separate bug)
  
  "Suspend" and "Hibernate" have NO effect, other than the dialog closes,
  in fact they behave the same as if "Cancel" has been pressed!
  
  When "Suspend" or "Hibernate" are selected manually in the power menu
  from the Unity desktop, they both work. In fact all options in that menu
  work.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: gnome-settings-daemon 3.4.2-0ubuntu14
  ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
  Uname: Linux 3.5.0-18-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.6.1-0ubuntu6
  Architecture: amd64
  Date: Sun Nov 18 14:09:45 2012
  EcryptfsInUse: Yes
  MarkForUpload: True
  SourcePackage: gnome-settings-daemon
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1080344

Title:
  No effect on Suspend and Hibernate buttons in power button shutdown
  dialog

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