I had a similar problem on 17.10, logging on as Ubuntu xorg (not unity). I tried running with just "ubuntu appindicators", but several indicators were missing (particularly classicmenu and gnome encfs).
Eventually I got all the icons I need back by installing both "topicons plus" and "Kstatusnotifieritem/appindictor support" extensions and disabling "ubuntu appindicators". On rebooting the latter then shows as having an error (in gnome tweaks). That's OK so far, since at least it now does what I need. However, occasionally on starting up "ubuntu appindicators" becomes enabled, and "Kstatusnotifieritem/appindictor support" disabled. I then lose my indicators, have to reset the extension statuses, reboot, and cross my fingers. -- You received this bug notification because you are a member of DX Packages, which is subscribed to indicator-application in Ubuntu. Matching subscriptions: dx-packages https://bugs.launchpad.net/bugs/1728449 Title: Indicator icons do not appear after upgrade to Ubuntu 17.10 Status in indicator-application package in Ubuntu: Confirmed Bug description: After upgrading from 17.04 to 17.10 all the indicator icons (Steam, InSync, Google Chrome, Hangouts, Slack, etc) are missing. A temporary workaround is to kill indicator-application-service, but this only works until the next reboot. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: indicator-application 12.10.1+17.04.20161201-0ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 Uname: Linux 4.13.0-16-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.7-0ubuntu3.1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sun Oct 29 20:45:06 2017 InstallationDate: Installed on 2015-03-28 (946 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=it_IT.UTF-8 SHELL=/bin/bash SourcePackage: indicator-application UpgradeStatus: Upgraded to artful on 2017-10-07 (22 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/indicator-application/+bug/1728449/+subscriptions -- Mailing list: https://launchpad.net/~dx-packages Post to : dx-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~dx-packages More help : https://help.launchpad.net/ListHelp