For me the issue about getting duplicate names in the output was due to the fact that my user was in both the "admin" and "sudo" group. Seems like polkit first lists all user from the sudo group, then all users from the admin group; not checking if the same user was listed twice.
so after a quick sudo gpasswd -d $USER admin The duplicate no longer appear. Hope this information is helpful. //Rikard -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to policykit-1 in Ubuntu. https://bugs.launchpad.net/bugs/1451815 Title: lists users multiple time when requiring user authentication Status in policykit-1 package in Ubuntu: Incomplete Bug description: To reproduce systemctl restart <some unit> ==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units === Authentication is required to manage system services or units. Multiple identities can be used for authentication: 1. Sergio Callegari (callegar) 2. Sergio Callegari (callegar) Choose identity to authenticate as (1-2): Why is the same identity seen as two different identities? ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: systemd 219-7ubuntu4 ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3 Uname: Linux 3.19.0-15-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.17.2-0ubuntu1 Architecture: amd64 CurrentDesktop: KDE Date: Tue May 5 14:50:15 2015 EcryptfsInUse: Yes MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-15-generic root=/dev/mapper/DISK00-root ro quiet splash nomodeset video=uvesafb:mode_option=1024x768-16,mtrr=3,scroll=ywrap nomdmonddf nomdmonisw vt.handoff=7 SourcePackage: systemd UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/21/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P2.10 dmi.board.name: N68-S dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.10:bd04/21/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnN68-S:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/policykit-1/+bug/1451815/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp