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Although a bit dated, I love Unity for how it lets me use up to 4 separate workspaces with more than one monitor. I sadly noticed this when I updated one of my computers to 17.10 (and now 18.04) and switched to Gnome.

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In Gnome Shell there is apparently no way to have two monitors, place windows on every monitor and switch to another (virtual) desktop/workspace with different windows or empty space. Instead Gnome pulls the windows of applications on non-primary monitors along as you move from one desktop to another. I looked into a few Gnome Shell extensions but none seem to address this.

Since I will upgrade my LTS desktops in the coming months what options do I have in 18.04 besides sticking with Unity 7?

Edit: I'm using Gnome Shell on my non-LTS Ubuntu computers and I would prefer finding a solution in Gnome Shell to get to know it better. I also use XFCE with GalliumOS, which behaves more like Unity and Gnome 2's pager panel applet, but I'd like a more full fledged and modern desktop environment.

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    You can always use Unity 7.5 until something better comes out. That's my plan anyway. – WinEunuuchs2Unix May 7 '18 at 15:13
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Status for Gnome Shell on 18.04

I now migrated to Gnome Shell. Multi Monitors makes it a bit easier giving me a the Ubuntu dock, top bar and and workspace selector on every screen.

What I'm missing at the moment is the possibility to show and run installed apps or commands no matter if I'm on the primary screen or not. Unity's Dash and Windows 10 start menu let me do this. In other words, it feels as limited as Windows 8. I'm also missing the possibility to pull windows from a different screen and workspace which may not be usable at the moment (KVM switch or switched to a different monitor input). Turns out Gnome has a useful shortcut which Unity had not and which works quite well in conjunction with the preview functionality of the launcher. There is Workspace Grid, but it doesn't (intend to) solve the problem. Many issues seem to be rooted in the a lack of understanding that multi-monitor users may just want to have the same configuration on every screen and access to all windows. Gnome would be my favorite desktop if it hadn't these two issues. I hope developers are open to improvements in this regard. I don't want them copy old patterns that they think would not fit, I just wan't to work with the least friction across multiple monitors.


Investigation and alternatives

Gnome pulls the windows of applications on non-primary monitors along as you move from one desktop to another. I looked into a few Gnome Shell extensions but none seem to address this.

… or in other words it just handles all but the primary display like the are no workspaces.

I would prefer finding a solution in Gnome Shell to get to know it better.

Turns out extensions are the wrong place to look for a solution. Gnome's Mutter is capable of doing it out of the box, the problem as I found is a design decision! I did not expect Ubuntu shipping the desktop like this after having used Gnome 2 and Unity before.

This solved my problems:

I also checked other Ubuntu flavors. I heard praise for KDE Neon regarding resource usage, but using it feels no different than 10 years ago, it looks very modern though. Ubuntu Studio is based on XFCE looking very polished. Mate comes also with Mutiny but that doesn't affect multiple monitors and workspaces, it's still like using Gnome 2. Budgie/Solus looks promising, but transition from Budgie 10 to the upcoming 11 is going move from GTK/Gnome to Qt. Not sure how well that will go, how the current status is, how long this will take and what the future brings. Latest (preview) builds of Linux Deepin look very fancy but appear to be for types of users who care more about wallpapers and transparency/blur effects while just using one monitor and workspace.

Edit 2018-09-13: Kwin comes with some desktop effects including Desktop Cube and Desktop Grid. One can create a shortcut to a command and put it in the panel which comes close to Unity, but it doesn't display the grid for both screens on one, which was quite handy in Unity using a KVM switch.

Edit 2020-03-26: Wayfire has a lot of bling that Compiz had. Not that I need all of that, but after working with Gnome in 18.04 and Windows 10 and latest ChromeOS, some parts were ahead of its time. Latest Pop_OS! Shell is probably also worth a second look.

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  • Does it mean that GNOME out of the box doesn't have workspaces on secondary monitors? Or that they are handled separately, on a per monitor basis, like it should be and like macOS does? – Andrea Lazzarotto May 21 '18 at 10:32
  • I tried to explain it before: if you have workspaces work in the primary monitor but others behave like they don't, if you have a window open on the secondary monitor and you switch to another work space the window will still be there occupying space. Sorry I don't have a Mac so I don't know how it does it. – LiveWireBT May 21 '18 at 11:36
  • In macOS the default option is that you can manage how many workspaces you want on each monitor. – Andrea Lazzarotto May 21 '18 at 11:57
  • Ok thank you, no that's no the case here. You can only enable if you want workspaces on non-primary monitors and by default it is disabled. – LiveWireBT May 21 '18 at 12:10
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GNOME is inherently limited, by design. The developers have taken simplicity to the extreme. Many configuration options that users (think they) want either do not exist or must be set via special tools (such as gsettings from the command line). Issues with GNOME will be left for others to address and will not be discussed further.

The rest of this answer is specifically in response to the question, "What options [alternative 18.04 desktop environment] do I have in 18.04...?"

  • Unity may continue to be used on Ubuntu 18.04.

    sudo aptitude install ubuntu-unity-desktop
    
  • There are other Ubuntu Flavors that default to different desktop environments:

  • Rather than installing different Flavors from scratch, other desktops can be installed on an existing system. Each flavor has a corresponding package, which may be found by searching:

    sudo aptitude search .-desktop$
    

    Most, such as KDE Plasma, don't "pulls the windows of applications on non-primary monitors along as you move from one desktop to another."

    sudo aptitude install kubuntu-desktop
    
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  • ... or install Kubuntu from its iso file :-) – sudodus May 7 '18 at 15:22
  • that should be "ubuntu-unity-desktop" – Rinzwind May 7 '18 at 15:30
  • I was actually looking for answers that either tell me and others how to configure Gnome to handle multiple monitors better (found it already) or show how using workplaces and multiple monitors is implemented on other desktops today. Coming from Compiz/Unity one has expectations that it can be done better than what was default in the early 2000's. Also doing aptitude/apt search desktop brings up a lot of irrelevant results. A good answer should be a bit more than dropping a few package names. – LiveWireBT May 21 '18 at 10:27
  • "... how to configure Gnome..." – That would be a different question. The title of your question requests "alternative 18.04 desktop environment". Since GNOME is the default, it is not an "alternative". Your original question states that you've tried GNOME and found it lacking, which implies you are seeking other options. Not until a later edit do you note you'd like to stay with GNOME. – xiota Apr 12 '20 at 18:02
  • "... show how using workplaces and multiple monitors is implemented on other desktops today..." – Nothing in your question indicates that you are seeking an explanation of how other desktops work. Also, there are so many different desktops, it's unreasonable to expect anyone to address all of them. – xiota Apr 12 '20 at 18:02
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On Ubuntu 18.04 with gnome-shell 3.28.2, you can configure that workspaces span all displays with gnome-tweaks -> Workspaces -> Workspaces span multiple monitors.

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