Using the steps to reproduce I can reproduce this bug but I can find this information out through right clicking on network manager applet and pressing connection information gives me my leased ip adderess from dhcp. Another workaround is to run ifconfig in a terminal.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-system-tools in Ubuntu. https://bugs.launchpad.net/bugs/1544578 Title: network-admin does not show leased DHCP address Status in gnome-system-tools package in Ubuntu: Confirmed Bug description: In Lubuntu 14.04.4-beta for PPC, the network manager does not show the leased DHCP address. LXDE -> System Tools -> Network -> General The General tab should show the current IP address in use regardless of whether it was gained by DHCP. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: gnome-system-tools 3.0.0-3ubuntu4.1 ProcVersionSignature: Ubuntu 4.2.0-28.33~14.04.1-powerpc-smp 4.2.8-ckt3 Uname: Linux 4.2.0-28-powerpc-smp ppc ApportVersion: 2.14.1-0ubuntu3.19 Architecture: powerpc CasperVersion: 1.340.2 CurrentDesktop: LXDE Date: Thu Feb 11 16:20:55 2016 LiveMediaBuild: Lubuntu 14.04.4 LTS "Trusty Tahr" - Beta powerpc (20160210) ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gnome-system-tools UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-system-tools/+bug/1544578/+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