Comment 37 for bug 1085706

BTW: This bug also affects KDE systems, not just Gnome/GTK. When the screen is locked, it always takes some seconds until I am logged in after typing my password.

lsb_release -a
No LSB modules are available.
Distributor ID: neon
Description: KDE neon LTS User Edition 5.8
Release: 16.04
Codename: xenial

apt-cache policy sddm
sddm:
  Installed: 0.14.0-1~2.gbpf70012+16.04+xenial+build2
  Candidate: 0.14.0-1~2.gbpf70012+16.04+xenial+build2
  Version table:
 *** 0.14.0-1~2.gbpf70012+16.04+xenial+build2 500
        500 http://archive.neon.kde.org/user/lts xenial/main amd64 Packages
        100 /var/lib/dpkg/status
     0.14.0-1~2.gbpf70012+16.04+build1 500
        500 http://archive.neon.kde.org/user/lts xenial/main amd64 Packages
     0.13.0-1ubuntu5 500
        500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages

apt-cache policy ecryptfs-utils
ecryptfs-utils:
  Installed: 111-0ubuntu1.1
  Candidate: 111-0ubuntu1.1
  Version table:
 *** 111-0ubuntu1.1 500
        500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
        100 /var/lib/dpkg/status
     111-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages

apt-cache policy kde-cli-tools
kde-cli-tools:
  Installed: 4:5.8.7-0neon+16.04+xenial+build6
  Candidate: 4:5.8.7-0neon+16.04+xenial+build6
  Version table:
 *** 4:5.8.7-0neon+16.04+xenial+build6 500
        500 http://archive.neon.kde.org/user/lts xenial/main amd64 Packages
        100 /var/lib/dpkg/status
     4:5.8.6-0neon+16.04+build5 500
        500 http://archive.neon.kde.org/user/lts xenial/main amd64 Packages
     4:5.5.5-0ubuntu1.1 500
        500 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages
        500 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages
     4:5.5.5-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages

apt-cache policy kde-config-screenlocker
kde-config-screenlocker:
  Installed: 5.8.7-0neon+16.04+xenial+build7
  Candidate: 5.8.7-0neon+16.04+xenial+build7
  Version table:
 *** 5.8.7-0neon+16.04+xenial+build7 500
        500 http://archive.neon.kde.org/user/lts xenial/main amd64 Packages
        100 /var/lib/dpkg/status
     5.8.6-0neon+16.04+build6 500
        500 http://archive.neon.kde.org/user/lts xenial/main amd64 Packages
     5.5.5-0ubuntu1 500
        500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages