I do not thing that this a bug in light-locker, but in lightdm. Similar report: bug 1296276
** Package changed: light-locker (Ubuntu) => lightdm (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1559618 Title: light-locker appears to incorrectly handle Kerberos ticket cache filenames Status in lightdm package in Ubuntu: Confirmed Bug description: When unlocking an Ubuntu 16.04 system which is using light-locker as the screen saver, Kerberos authentication works for a normal, unprivileged user, except that the resulting ticket cache is incorrectly named. Instead of the resulting ticket cache created as a result of such successful authentication being named something like: krb5cc_1000 (if the UID of the user is 1000) ...the cache file is named: krb5cc_0 (which would presumably be correct if root were logging in, but not a normal, unprivileged user) I am willing to help debug this issue, so if there is anything you would like me to try, please let me know. Thanks, Brian ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: light-locker 1.7.0-2ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-14.30-generic 4.4.5 Uname: Linux 4.4.0-14-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 Date: Sat Mar 19 22:32:52 2016 InstallationDate: Installed on 2016-03-19 (0 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160318) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: light-locker UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1559618/+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