Well, I think I found out what was happening. In gnome-tweaks I had somehow gotten 'Workspaces' -> 'Display Handling' set to 'Workspaces on primary display only'.
So what happened was that there was only a single workspace on the "second" head and thus no need for "always on visible workspace". I'm going to close this as 'Invalid'. ** Changed in: mutter (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1797120 Title: window menu does not include 'always on visible workspace' Status in mutter package in Ubuntu: Invalid Bug description: I filed bug 1795410 a few weeks ago complaining that the 'alt space' didn't bring up the window menu. That is now fixed (seemingly likely with mutter 3.3.0-6). However, the window menu that does come up does not have an entry for 'Always on visible workspace' as it used to. You can still create a custom shortcut in the gnome-control-center to toggle this, but that is not as useful or discoverable as in the window menu. ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: mutter 3.30.1-1 ProcVersionSignature: Ubuntu 4.18.0-8.9-generic 4.18.7 Uname: Linux 4.18.0-8-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.10-0ubuntu11 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed Oct 10 09:21:40 2018 EcryptfsInUse: Yes InstallationDate: Installed on 2015-07-23 (1175 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: mutter UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1797120/+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