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[Mateusz Stachowski <1305586@xxxxxxxxxxxxxxxxxx>]

I confirm what Simon Buchan wrote in his comment.

- I start VirtualBox with Ubuntu 12.04.4 LTS as guest, fullscreen
- Wait for Unity lockscreen (timeout set to 1 minute for testing)
- Keyboard input does not seem to respond, mouse works fine.

Now there is other workaround to get input not going to the VM but to
lockscreen text box. I just need to switch off fullscreen for the VM
with keyboard shortcut Host + F (by default Right Ctrl + F) and then
open indicators and finally switch to the lockscreen password text box.

I have only one monitor.

@Simon this particular problem might be resolved with the Unity SRU
update. Christopher Townsend mentioned in comment #23 that the Compiz
SRU doesn't resolve all the problems and that Unity SRU has still some
fixes which should make this bettter.

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https://bugs.launchpad.net/bugs/1305586

Title:
  Lock screen is unusable when some windows have a keyboard/mouse grab

Status in Compiz:
  Fix Committed
Status in Compiz 0.9.11 series:
  In Progress
Status in Unity:
  Fix Released
Status in Unity 7.2 series:
  In Progress
Status in “compiz” package in Ubuntu:
  Fix Released
Status in “unity” package in Ubuntu:
  Fix Released
Status in “compiz” source package in Trusty:
  Fix Committed
Status in “unity” source package in Trusty:
  Confirmed

Bug description:
  [Impact]

  Some windows will grab the keyboard/mouse and when the lockscreen
  kicks in, this window will still have the grab and thusly, ou can
  enter your password in the lockscreen.

  [Test case]

  1. Open a window that will hold the grab, such as the ssh password dialog.
  2. Wait for the lock screen to activate.
  3. Enter your password to unlock the screen.

  [Regression potential]

  This particular fix doesn't fix all cases, but does fix it for some.
  That said, no new regressions are expected.

  * Debdiff is found at https://launchpadlibrarian.net/178439518/compiz-
  trusty-sru-2.debdiff *

  Original Description:

  My screen just timed out and locked when a password prompt which had a
  grab was displaying.

  I couldn't type my password or interact with the indicators.

  gnome-screensaver just refuses to lock in this situation, perhaps
  unity could do the same unless it's possible to remove and readd the
  grabs yourself, but I don't think XLib lets you do that (you can only
  remove your own grabs AFAIK).

  TEMPORARY WORKAROUND TO LOGIN AGAIN:
  Click on the guest session
  Once the guest session is started log out
  This takes you back to the lightdm session screen you can then login to your user session and it be in the same state

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: unity 7.2.0+14.04.20140409-0ubuntu1 [origin: unknown]
  ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
  Uname: Linux 3.13.0-23-generic x86_64
  ApportVersion: 2.14.1-0ubuntu1
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CrashDB: unity
  CurrentDesktop: Unity
  Date: Thu Apr 10 09:39:45 2014
  InstallationDate: Installed on 2012-10-07 (549 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Beta amd64 (20121007)
  SourcePackage: unity
  UpgradeStatus: Upgraded to trusty on 2013-05-07 (338 days ago)

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