I have the same problem sometimes after screen saver activated. I guess the problem is VirtualBox witn Win7. If last active application is VirtualBox with Win7 all keyboard stream go to in Windows but not in password field. Usually I use change user way to reactivate password field.
Also keyboard layout switcher does not work from keybord (Ctrl+Shift) complitly (I change it by mouse) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-greeter in Ubuntu. https://bugs.launchpad.net/bugs/1255558 Title: Can't type my password after cold boot Status in “unity-greeter” package in Ubuntu: Fix Released Bug description: Can't type my password after cold boot unless I change my keyboard layout to next (or change and then re-change to same layout) ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lightdm 1.9.3-0ubuntu1 ProcVersionSignature: Ubuntu 3.12.0-4.10-generic 3.12.1 Uname: Linux 3.12.0-4-generic x86_64 ApportVersion: 2.12.7-0ubuntu1 Architecture: amd64 Date: Wed Nov 27 16:27:13 2013 InstallationDate: Installed on 2013-11-19 (7 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131119) SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/1255558/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp