I can confirm that Martin Vysny's solution/workaround works in Ubuntu 18.04.1LTS. (this was not the case in Ubuntu Alpha when I reported this bug)
Please note that you have to reboot (or log-off and logon again) for the system-monitor to show up in the gnome-tweaks extensions page. Time to say goodbye to indicator-multiload and thank Michael Hofmann for the years of enjoyment we had from his software indicator-multiload. Thank you Michael -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell-extension-appindicator in Ubuntu. https://bugs.launchpad.net/bugs/1714804 Title: Aardvark Daily: Indicator-Multiload doesn't show full-width Status in System Load Indicator: New Status in gnome-shell-extension-appindicator package in Ubuntu: Confirmed Bug description: In Ubuntu Indicator-Multiload is an essential application as it shows that computer is actually doing something even when an application is giving no feedback for a long period of time. Conky is not an option as it gets hidden behind full screen applications. Unfortunately the move to Gnome has broken indicator-multiload so that it can't show all of the indicators. CPU Memory Network Swap System Load Disk I've tried the developers suggestion of installing TopIcons and TopIconsplus to no avail. I see that Ubuntu App-Indicator is also installed so maybe app-indicator extension is broken in Gnome and not indicator-multiload. Anyway steps to reproduce: Install Ubuntu 16.04.x LTS Install indicator-multiload Open the settings of indicator-multiload by clicking on it and choosing settings Click all of the sources on You will now see 6 panels showing the earlier described graphs. Now install Ubuntu 17.10 Daily Install indicator-multiload Mouse over the top bar to faintly get an idea where indicator-multiload is running click on it and open the settings Click all of the sources on You will now see tiny faint lines which give no clue whatsoever as to what is going on with the machine. Please fix either app-indicator extension or indicator-multiload to work with Gnome. Thanks ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: indicator-multiload 0.4-0ubuntu5 ProcVersionSignature: Ubuntu 4.12.0-12.13-generic 4.12.8 Uname: Linux 4.12.0-12-generic x86_64 ApportVersion: 2.20.7-0ubuntu1 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Sun Sep 3 19:12:33 2017 InstallationDate: Installed on 2017-09-03 (0 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170902) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=nl_NL.UTF-8 SHELL=/bin/bash SourcePackage: indicator-multiload UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/indicator-multiload/+bug/1714804/+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