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[Bruce MacNaughton <bmacnaughton@xxxxxxx>]

I updated to Unity 7.2.4 (using the ppa described above) and still have
the problem. It happens quite regularly, but not predictably.

Ubuntu version:

LSB Version:    core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-md64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:core-4.1-amd64:core-4.1-noarch:security-4.0-amd64:security-4.0-noarch:security-4.1-amd64:security-4.1-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.1 LTS
Release:        14.04
Codename:       trusty

Dual monitors. The password box only appears on the monitor that is
"active" as defined by where the mouse pointer is. When it stops working
the dialog box has no  text-entry field. I can switch the dialog from
one monitor to the other but the text-entry field for the password will
never appear.

I can SSH into the machine,  issue "unity --replace" and it will cause
the password prompt to reappear. I can then issue "unity --reset-icons"
(but only after entering my password and finding an open terminal
windows - this doesn't work from the SSH session) to get the UI to the
desktop working again. If there is no open terminal window I am out of
luck - there is no keyboard interaction with the desktop and there are
no controls available to open a window with a mouse).  I have to fix all
my terminal windows which have moved to the upper left of the leftmost
screen but I'm OK.

The "unity --reset-icons" command hangs and if I ctrl-c the terminal
session or stop that process I lose the UI again. But as long as that
terminal session stays open things work. It enter the error state again
(no password field in login dialog) after I've done this.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to unity in Ubuntu.
https://bugs.launchpad.net/bugs/1311316

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

Status in Unity:
  Fix Committed
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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