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[Alex Botev <botevmg@xxxxxxxxx>]

Also if you could answer the question in #108 this could help us a lot
to further debug if necessary the PAM module.

And to add, I'm also using a finger print reader (fprintd) as an authentication before the password, but there are some interesting facts about it(before anyone jump and point fingers there):
It has a timeout of 10s, the wait for the password text area is ~1 min
If I suspend the laptop manually and wake it it uses the fingerprint reader normally.
If I close the lid and open it - the finger print reader authentication is not available and the bug occurs. 
Conclusion:
Possibly the fprintd.so library is not loaded for some reason on lid open, or the PAM module encounters some problems, after which it falls back (somehow) to the unix password. Again if you answer #108 would be most appreciated.

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https://bugs.launchpad.net/bugs/1311316

Title:
  After locking screen there is no input field to type password for
  unlock

Status in Unity:
  Fix Released
Status in Unity 7.2 series:
  In Progress
Status in unity package in Ubuntu:
  Fix Released

Bug description:
  *** IMPORTANT **

  *** The fix is not included in TRUSTY. Will be included with next SRU.
  ***

  If you can reproduce this bug please be sure to provide the following info:
  1. Do you use a multi-head setup? If yes, using just one monitor fixes the issue?
  2. Can you reproduce all the time?
  3. Do you use ldap? If yes, using gnome-screensaver fix the issue (see comment #115) can you still reproduce that?
  4. Please consider posting /var/log/auth.log (at least part of it, should not contain sensitive information)
  5. Please specify the unity version
  *** END IMPORTANT **

  Sometimes (but not always) after locking the screen there is the
  situation not having any input field where I can type the password to
  unlock the session again. The shaded gray area simply does not have
  the input field. I can't do anything, I have to switch to text console
  and stop/start lightdm service to cure the problem loosing all of my
  session :(

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: unity 7.2.0+14.04.20140416-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic i686
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: i386
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CurrentDesktop: Unity
  Date: Tue Apr 22 22:17:57 2014
  InstallationDate: Installed on 2012-03-03 (780 days ago)
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
  SourcePackage: unity
  UpgradeStatus: Upgraded to trusty on 2013-10-18 (186 days ago)

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