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On 2017-03-15T06:22:25+00:00 Ccheney-8 wrote:

It would be nice if the primary included gnome-shell extensions, eg
apps-menu and places-menu (and by extension the topbar) supported multi-
monitor similar to how the bottom bar 'window-list' currently does. This
was easy to achieve on Gnome 2 and now via MATE (out of the box) but
there does not appear to be any way to do this with Gnome 3. This also
leads to there not being a way to do this via 'Gnome Classic'. Even
Windows finally (in W10) does this better out of the box than Gnome 3.

BTW - Intel has supported IGP triple head since Ivy Bridge (2012) so it
is very cheap to deploy a triple head system (~ $200 for 3 1080p
monitors). AMD supports up to quad head in their IGPs.

This has been blocking me from moving to Gnome 3 since its release and I
finally decided to write a bug report about it. I have had all multi-
monitor systems since prior to 2004.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/0

------------------------------------------------------------------------
On 2017-03-15T06:39:00+00:00 Ccheney-8 wrote:

Created attachment 347984
Gnome 2

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/1

------------------------------------------------------------------------
On 2017-03-15T06:39:20+00:00 Ccheney-8 wrote:

Created attachment 347985
Windows 8

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/2

------------------------------------------------------------------------
On 2017-03-15T06:39:38+00:00 Ccheney-8 wrote:

Created attachment 347986
Windows 10

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/3

------------------------------------------------------------------------
On 2017-03-15T06:59:12+00:00 Ccheney-8 wrote:

Created attachment 347988
Mate 1.18.0

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/4

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On 2017-03-16T10:21:47+00:00 Allan Day wrote:

I'm sorry, but I don't understand this.

(In reply to Chris Cheney from comment #0)
> It would be nice if the primary included gnome-shell extensions, eg
> apps-menu and places-menu (and by extension the topbar)

What is "the primary"?

> supported
> multi-monitor similar to how the bottom bar 'window-list' currently does.

Can you be more specific? What feature do you want, exactly?

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/5

------------------------------------------------------------------------
On 2017-03-16T10:40:09+00:00 Florian-muellner wrote:

(In reply to Allan Day from comment #5)
> > supported
> > multi-monitor similar to how the bottom bar 'window-list' currently does.
> 
> Can you be more specific? What feature do you want, exactly?

Probably something like https://extensions.gnome.org/extension/323
/multiple-monitor-panels/

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/6

------------------------------------------------------------------------
On 2017-03-16T14:41:55+00:00 Ccheney-8 wrote:

Presumably the extensions that Gnome itself ships as opposed to ones
that 3rd parties supply on http://extensions.gnome.org/ , which would be
the responsibility of those 3rd party developers.

i.e. these:

https://git.gnome.org/browse/gnome-shell-extensions/tree/extensions

In particular apps-menu, and places-menu as window-list already properly
supports multiple monitors. I would like to be able to replicate the
look (at least more or less) of what is shown in the MATE 1.18.0 picture
attached to this BZ. You can already do this with Gnome Classic for 1
screen, but not for more than 1.

The previously mentioned 3rd party extension does work to replicate the
'Activities' button but does not replicate the others mentioned and
would be better suited in the official set of extensions so that it does
not break in the future as it has often in the past with new gnome
releases.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/7

------------------------------------------------------------------------
On 2017-03-16T14:51:33+00:00 Ccheney-8 wrote:

Created attachment 348094
Gnome 3

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/8

------------------------------------------------------------------------
On 2017-03-16T14:53:09+00:00 Ccheney-8 wrote:

Compare the MATE 1.18.0 to Gnome 3 picture. It does not appear to be
possible currently to make a Gnome 3 desktop look similar to the MATE
1.18.0 (Gnome 2) desktop for multiple monitors. However, it works fine
for a single monitor.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/9

------------------------------------------------------------------------
On 2017-03-16T14:54:58+00:00 Allan Day wrote:

(In reply to Florian Müllner from comment #6)
...
> > Can you be more specific? What feature do you want, exactly?
> 
> Probably something like
> https://extensions.gnome.org/extension/323/multiple-monitor-panels/

Ah, right.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/10

------------------------------------------------------------------------
On 2017-03-16T16:00:28+00:00 Florian-muellner wrote:

(In reply to Chris Cheney from comment #7)
> Presumably the extensions that Gnome itself ships as opposed to ones that
> 3rd parties supply on http://extensions.gnome.org/

No, you don't want that in the extensions. Each extension is separate,
so what you are asking for here is that apps-menu and places-menu *both*
add top bars to non-primary monitors. We are definitely not going to add
two or more stacked panels at the top.

What you probably want instead is an option in gnome-shell to put top
bars on non-primary monitors, and the aforementioned extensions to
handle that case.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/11

------------------------------------------------------------------------
On 2017-03-16T16:29:30+00:00 Ccheney-8 wrote:

(In reply to Florian Müllner from comment #11)
> (In reply to Chris Cheney from comment #7)
> > Presumably the extensions that Gnome itself ships as opposed to ones that
> > 3rd parties supply on http://extensions.gnome.org/
> 
> No, you don't want that in the extensions. Each extension is separate, so
> what you are asking for here is that apps-menu and places-menu *both* add
> top bars to non-primary monitors. We are definitely not going to add two or
> more stacked panels at the top.
> 
> What you probably want instead is an option in gnome-shell to put top bars
> on non-primary monitors, and the aforementioned extensions to handle that
> case.

That sounds like a great solution, I tried looking at it before but got
lost on how to do it (I think) due to the explanation you just gave.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/12

------------------------------------------------------------------------
On 2017-03-23T06:17:21+00:00 Ccheney-8 wrote:

Is there anything else needed, I noticed the BZ is still set to NEEDINFO

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/13

------------------------------------------------------------------------
On 2017-03-30T19:11:13+00:00 Florian-muellner wrote:

(In reply to Chris Cheney from comment #13)
> Is there anything else needed, I noticed the BZ is still set to NEEDINFO

Well, we've established what you want, but that doesn't necessarily mean
that we'll implement it.

So far the reasoning seems to be:
 - you really want the feature
 - GNOME 2 / Windows has it

Unlike the case of the window list, nothing in the top bar (except for
the app menu to some extent) is tied to a particular monitor, so there's
a much weaker case here IMHO.

(I'll also note that this wouldn't be a "cheap" option, but require work
on lots of details throughout the stack - we'd need to figure out the
overview (only include the activities button on the primary monitor? or
allow an overview on any monitor?), get API to control the brightness of
a particular monitor (rather than the built-in one), don't use "the
monitor with the top bar" as indicator for the primary monitor in
Settings, ...)

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/14

------------------------------------------------------------------------
On 2017-04-03T18:28:35+00:00 Renan-biegel wrote:

Well, don't know if you are going to do that, but it would be nice to
have to have this kind of thing.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/15

------------------------------------------------------------------------
On 2017-04-09T02:00:30+00:00 Ccheney-8 wrote:

"we'd need to figure out the overview (only include the activities
button on the primary monitor? or allow an overview on any monitor?)"

That's a good point and really should already be supported, I noticed
you currently can't see what are on the other monitors in overview mode
either. Some of this could hidden behind gnome-tweak-tool if it is
deemed too complicated for regular users, as is done for some of the
options already.

"get API to control the brightness of a particular monitor (rather than
the built-in one)"

I'm not sure how monitors other than the ones I have access to work but
usually only eDP monitors can control brightness via software, right? I
know it doesn't appear to be adjustable via software on my current HDMI
LCDs. If newer additional screens (eg hdmi/dp) can be adjusted through
software that is probably something that should be supported as well.
However, I have seen ads for some newer monitors that appear to possibly
be only adjustable via software, I don't know if they do that over the
HDMI/DP connection or via some other manner, eg USB.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/16

------------------------------------------------------------------------
On 2017-04-09T05:51:30+00:00 Ccheney-8 wrote:

Someone pointed out to me that Gnome Shell is actually the only major
desktop environment that doesn't work well with multi monitor setup, so
I took a look to see if that was actually true. The only one I found
that doesn't is Budgie which is based on Gnome Shell and they are
intending to fix the issue in their next release, with an open approved
issue #436.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/17

------------------------------------------------------------------------
On 2017-04-09T05:51:52+00:00 Ccheney-8 wrote:

Created attachment 349543
Cinnamon Desktop

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/18

------------------------------------------------------------------------
On 2017-04-09T05:52:25+00:00 Ccheney-8 wrote:

Created attachment 349544
KDE

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/19

------------------------------------------------------------------------
On 2017-04-09T05:52:48+00:00 Ccheney-8 wrote:

Created attachment 349545
LXDE

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/20

------------------------------------------------------------------------
On 2017-04-09T05:53:15+00:00 Ccheney-8 wrote:

Created attachment 349546
Ubuntu Unity

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/21

------------------------------------------------------------------------
On 2017-04-09T05:53:32+00:00 Ccheney-8 wrote:

Created attachment 349547
XFCE

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/22

------------------------------------------------------------------------
On 2017-04-09T06:04:41+00:00 Ccheney-8 wrote:

Apparently Budgie is planning to fix #436 in part by dropping GTK/Gnome
entirely and switching to Qt.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/23

------------------------------------------------------------------------
On 2017-04-10T21:07:25+00:00 Rasmus Eneman wrote:

I second the need for this. Unity supports tracking the active monitor
and shows notifications, opens apps and let me use the dash and HUD on
the one currently active. Gnome however forces me to always move back to
the primary which requires far more mouse motion.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/24

------------------------------------------------------------------------
On 2017-04-19T17:31:40+00:00 PioneerAxon wrote:

I have been using dual monitor system for a while now, and I can
hopefully add a few use cases that I think are missing from the Shell.

1. By default gnome-shell treats second monitor as external monitor. Which 
means, that I am limited to only one workspace on one monitor. This is 
sub-optimal as I rarely want to stare at the same workspace while I keep on 
switching workspace on other monitor.
2. Missing top panel makes the second screen look weird as maximized windows 
appear at different heights.
3. With more apps using application menu, we have to go across almost 2 entire 
screens just to open something like preference. (assuming primary display is on 
left)
4. If the primary display is on right, system settings is on the right most 
corner, which is again up to 2-screen wide sweep.
5. The task switcher (the popup when you keep alt pressed + tab) appears only 
on the primary screen.

These are just few of the frustrating operations that make no sense on a
multi-monitor setup. So far I have been using multi-monitor-addon
(mentioned above) to solve most of these. But having to use a third-
party addon to achieve basic desktop functionality is something that
needs to be given second thought in my opinion.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/27

------------------------------------------------------------------------
On 2017-04-21T14:02:30+00:00 Mark L. Potter wrote:

I'd like to add that the idea for a top bar that clones to each monitor
isn't a strange request. Using 2 large, widescreen, monitors means that
without the ability to have the same bar on each monitor a user is
switching focus more often than is necessary, add another monitor and
you've got a huge amount of eye travel for some very basic tasks.

The multi-monitor extension is an alright workaround but it's simply not
ideal as you can't fully replicate the top bar on all monitors. From
what I can tell, and this is only a cursory look, full replication isn't
possible at present even writing an extension.

This is a UX issue and the argument that people only want this because
other OS/Desktops have it is tone deaf. It is a usability issue and a
useful feature that is implemented in other OSs and many other Desktops.
Expecting what quite a few people expect as basic desktop functionality
isn't an illogical thing.

I think this is something the Gnome Shell team needs to consider. I
second pretty much everything PioneerAxon has said only add an entire
other monitor to his complaints about mouse travel. The added eye
movement and mouse travel are unnecessary and could be mitigated by
implementing a feature that has been present in multiple desktops for
many years.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/28

------------------------------------------------------------------------
On 2017-05-16T21:23:35+00:00 Marcin-j-nowak wrote:

Hi. I am really missing top-bar cloning on multiple monitor, because I
am using dual-head setup as a separate & independent displays, mostly.

There are two major use cases (IMO):

1. 1st display for work and a 2nd display as a preview ("Workspaces only
on primary" enabled works great here, topbar is not required for 2nd
screen). This is a Gnome3 default and it is ok.

2. Both displays are used for work. This mode is best known from the
latest macOS, where user can just enable separate workspaces (topbar is
cloned, workspaces are separate). It would be nice to have such
possibility with Gnome3.

And for the 2nd case the cloned top-bar is required. Users are going to
achieve this by disabling "Workspaces only on primary" and top-bar
cloning, that's why they're writing here. Same as me.

I know that Gnome3 is not a macOS, but we're talking about most
efficient work with DE. This proposal sounds very promising
https://wiki.gnome.org/Projects/GnomeShell/DesignerPlayground/MultipleMonitors

Any chances?

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/30

------------------------------------------------------------------------
On 2017-05-16T22:22:48+00:00 Florian-muellner wrote:

(In reply to marcin.j.nowak from comment #27)
> 2. Both displays are used for work. This mode is best known from the latest
> macOS, where user can just enable separate workspaces (topbar is cloned,
> workspaces are separate). It would be nice to have such possibility with
> Gnome3.

Per-monitor workspaces would either require changes to the EWMH spec, or
GNOME dropping compliance with the spec (see [0] and the
_NET_CURRENT_DESKTOP/_NET_WM_DESKTOP properties)

Now wayland does not expose those details to clients, so compositors are
much less bound to a particular behavior (at the cost of cross-desktop
docks/task switchers/etc.); I therefore wouldn't dismiss the second
option altogether, but it's neither a small change nor something I'd
expect in the near future.

[0] https://specifications.freedesktop.org/wm-spec/wm-spec-
latest.html#idm140200477421552


> And for the 2nd case the cloned top-bar is required.

A real cloned top bar isn't in the cards - the best we can do is put a
top bar on every monitor, and ask extension authors to consider
"secondary" bars when adding items to the "primary" one.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/31

------------------------------------------------------------------------
On 2017-05-17T09:44:48+00:00 Marcin-j-nowak wrote:

Thank you for a reply.

As a workaround I can use "Always on visible workspace" option for main
window on the 1st display and switch (wide) workspaces. This will allow
me to work on 2nd display, while 1st display will remain almost
untouched. I am using Multi Monitors extension [0], but there is only
one thing missing - a widget with sound/network/bluetooth/user
properties. Almost everything else is already cloned somehow.

I like Gnome3, because it is well integrated, it has awesome
launcher/dash, it is extensible, it has hidpi support, and many, many
more. It is not stable as XFCE yet and consumes too much RAM and
battery, but I belive it will became a standard DE in the near future.
Having a "better" multi-head support will make Gnome a winner, even
comparing to macOS. I'd like to see such feature built in into Gnome,
without any hacks and workarounds. Fingers crossed.

I can't say anything about technical issues or EWMH spec. Don't get me wrong - 
I'm just sharing my thoughts as a regular user, not a developer. 
 
[0] https://extensions.gnome.org/extension/921/multi-monitors-add-on/

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/32

------------------------------------------------------------------------
On 2017-06-03T18:57:26+00:00 Lester Carballo Pérez wrote:

I think to be possible do that, is necessary:

1- Split extensions by categories (this will handled in a good way the 
interaction of an extension with all panels, as the extensions will extends for 
a control class that limited the possibility of the extensions making it more 
controllable).
   - General extensions.
   - Panel extensions.
All panel extensions will have one and only one actor inside the panel, they 
can add more actors inside this actor and this one actor will be provided by 
gnome shell controlled class.

Then it's easy move the actor between panels, as is one actor per
extensions.

2- Allow the possibility of create more than one instance per extension.
We the can have one extension in one panel and another in another panel
or both running in the same panel.

3- Create a panel manager class with a list of available panels. To be
possible set the actor of the extension in an specific panel.

4- Allow drag and drop the actor between panel and also set it in a
panel position, to re-layout the desktop as a user request.

5- Finally, please considered take a look to the cinnamon
implementation, where all this and more is possible.

The only real way that this could be possible is if this come from
gnome-shell. Non official extensions can not defined general desktop
protocols. So, the desktop is who need to create the general abilities
to organized functionalists that will not conflicted then all together.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/33

------------------------------------------------------------------------
On 2017-06-04T08:41:08+00:00 Nmg921 wrote:

(In reply to Lester Carballo from comment #30)
> I think to be possible do that, is necessary:
> 
> 1- Split extensions by categories (this will handled in a good way the
> interaction of an extension with all panels, as the extensions will extends
> for a control class that limited the possibility of the extensions making it
> more controllable).
>    - General extensions.
>    - Panel extensions.
> All panel extensions will have one and only one actor inside the panel, they
> can add more actors inside this actor and this one actor will be provided by
> gnome shell controlled class.
> 
> Then it's easy move the actor between panels, as is one actor per extensions.
> 
> 2- Allow the possibility of create more than one instance per extension. We
> the can have one extension in one panel and another in another panel or both
> running in the same panel.
> 
> 3- Create a panel manager class with a list of available panels. To be
> possible set the actor of the extension in an specific panel.
> 
> 4- Allow drag and drop the actor between panel and also set it in a panel
> position, to re-layout the desktop as a user request.
> 
> 5- Finally, please considered take a look to the cinnamon implementation,
> where all this and more is possible.
> 
> The only real way that this could be possible is if this come from
> gnome-shell. Non official extensions can not defined general desktop
> protocols. So, the desktop is who need to create the general abilities to
> organized functionalists that will not conflicted then all together.

Actions of "Panel Extensions" are  not panel specific so there no reason to 
make  more than one instance, because both instances will do the same thing. 
Clone of the icon (actor) of the extension in all of panels connected to the 
same instance would be enough to give access to all of it's functionality 
without running the same code twice.
Neither drag-and-drop support nor Panel manager are needed for this. Just every 
panel draws icons of all instanced extensions.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/34

------------------------------------------------------------------------
On 2017-06-04T10:22:26+00:00 Lester Carballo Pérez wrote:

Nikita Goncharuk(In reply to Nikita Goncharuk from comment #31)
I just mention how is implemented in cinnamon. This is one way that is proved. 
Is not the only one way. Drag and drop extension to some position as a user 
request just is mentions as one of the possibility that this way will provided.
Clone the actors (is make another instance of the actor only). If you do not 
clone the extension on deep (and just you clone the actor), you sure will have 
a lot of problems. For example, where will be displayed the menu of the actor 
that only have one instances? You can not prevent all possibilities that a 
third-party extension could introduced.

I just commented here, because as a user, won have the possibility of
set the panels in all possible places and not have the possibility of
set the actors inside the panels in all places of all panels, is the
thing that i considered is more important, and the big missing pieces.
This could be only possible if this come with the shell as a default
option. Because this is exactly the type of thing that defined how
flexible is a desktop from the user. Implement just one more possibility
(panels in all monitors), is a good related start, but for same rason,
panels in others positions are also important. Move the Actors to
several positions inside the panel, is less important, but also very
useful to avoid conflicts, because then non extensions will need to
override another just to get his places.

Anyway that's was my two cents, nothings more than that.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/35

------------------------------------------------------------------------
On 2018-01-08T01:22:40+00:00 Kaspermv+gnomebugzilla wrote:

(In reply to Florian Müllner from comment #28)
> Per-monitor workspaces would either require changes to the EWMH spec, or
> GNOME dropping compliance with the spec (see [0] and the
> _NET_CURRENT_DESKTOP/_NET_WM_DESKTOP properties)

Could you elaborate on why you interpret the spec this way? From my
reading the spec does not place this restriction. Perhaps you are
talking about the statement that "only one [virtual desktop] can be
shown on the screen at a time"? In the context of the earlier statement
that "Most X servers have only a single screen" this seems to me to
merely be a description of the case in which there is only one physical
screen; to generalize this statement to "only one [virtual desktop] can
be shown on a screen at a time" does not seem like too big of a stretch
when considering the multi-screen usecase.

Furthermore, I would like to express that as a multi-screen user, the UX
in Gnome is very poor. I am not convinced of the merit of the concept of
a static "primary" screen; the primary screen to me is whatever screen
the focused window is occupying. Having to look at a different screen in
order to be able to alt-tab properly, use the dash or search functions
in the overview, or use the panel is quite cumbersome.

To give an example of when Gnome doesn't work; I have a 2-monitor setup,
in most cases I am using my big monitor to focus on, and have some chat
applications and todolist open on my smaller monitor, so I want to have
the big monitor as primary for purposes of using the search, alt-tab,
panel, etc. However, sometimes I want to watch something in fullscreen;
in that case, being able to seamlessly switch to using my secondary
screen for actions that require the panel (monitoring chat
notifications, pausing my music, changing my volume) is something that
would really help.

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/38

------------------------------------------------------------------------
On 2018-01-08T11:31:56+00:00 Florian-muellner wrote:

This is going very off-topic from the per-monitor top bar request that
this issue is about, but well ...


(In reply to Kasper from comment #33)
> (In reply to Florian Müllner from comment #28)
> > Per-monitor workspaces would either require changes to the EWMH spec, or
> > GNOME dropping compliance with the spec (see [0] and the
> > _NET_CURRENT_DESKTOP/_NET_WM_DESKTOP properties)
> 
> Could you elaborate on why you interpret the spec this way? From my reading
> the spec does not place this restriction. Perhaps you are talking about the
> statement that "only one [virtual desktop] can be shown on the screen at a
> time"? In the context of the earlier statement that "Most X servers have
> only a single screen" this seems to me to merely be a description of the
> case in which there is only one physical screen; to generalize this
> statement to "only one [virtual desktop] can be shown on a screen at a time"
> does not seem like too big of a stretch when considering the multi-screen
> usecase.

First not that "screen" does *not* mean "monitor" - it is an X11 concept
that abstracts a particular combination of display and input devices.
Mutter (and therefore gnome-shell) doesn't support more than a single
screen, so the multi-screen scenario is not relevant at all - we do
support multiple *monitors* of course, but as I said, that's not
directly tied to X11 screens.

To answer your question: The spec specifies properties for the number of
workspaces and the index of the active workspace, both are set on the
(unique) root window - that is, it is impossible to express separate
per-monitor properties while still complying with the spec.

(Although as we are moving to wayland, compliance with EWMH is becoming
less important than it used to be.)

Reply at: https://bugs.launchpad.net/ubuntu/+source/gnome-
shell/+bug/1682542/comments/39


** Changed in: gnome-shell
       Status: Unknown => Incomplete

** Changed in: gnome-shell
   Importance: Unknown => Medium

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1682542

Title:
  Add support for top bars on all monitors to allow for multi-monitor
  support in primary extensions - apps-menu, places-menu, topbar, etc

Status in GNOME Shell:
  Incomplete
Status in gnome-shell package in Ubuntu:
  Triaged

Bug description:
  This issue will effectively be a regression in desktop usage once
  Ubuntu switches from Unity to Gnome Shell. Gnome Shell does not work
  well with multiple monitors unlike every other desktop environment
  except Budgie, which is switching away from GTK/Gnome to Qt with
  Budgie 11 due out in the next month or two.

  I reported it upstream last month but it does not appear to have much
  traction at the moment.

  https://bugzilla.gnome.org/show_bug.cgi?id=780078

  "
  It would be nice if the primary included gnome-shell extensions, eg apps-menu 
and places-menu (and by extension the topbar) supported multi-monitor similar 
to how the bottom bar 'window-list' currently does. This was easy to achieve on 
Gnome 2 and now via MATE (out of the box) but there does not appear to be any 
way to do this with Gnome 3. This also leads to there not being a way to do 
this via 'Gnome Classic'. Even Windows finally (in W10) does this better out of 
the box than Gnome 3.

  BTW - Intel has supported IGP triple head since Ivy Bridge (2012) so
  it is very cheap to deploy a triple head system (~ $200 for 3 1080p
  monitors). AMD supports up to quad head in their IGPs.

  This has been blocking me from moving to Gnome 3 since its release and I 
finally decided to write a bug report about it. I have had all multi-monitor 
systems since prior to 2004.
  "

  And see comments #11 and #14 from Florian.

  "
  No, you don't want that in the extensions. Each extension is separate, so 
what you are asking for here is that apps-menu and places-menu *both* add top 
bars to non-primary monitors. We are definitely not going to add two or more 
stacked panels at the top.

  What you probably want instead is an option in gnome-shell to put top bars on 
non-primary monitors, and the aforementioned extensions to handle that case.
  "

  "
  Well, we've established what you want, but that doesn't necessarily mean that 
we'll implement it.

  So far the reasoning seems to be:
   - you really want the feature
   - GNOME 2 / Windows has it

  Unlike the case of the window list, nothing in the top bar (except for
  the app menu to some extent) is tied to a particular monitor, so
  there's a much weaker case here IMHO.

  (I'll also note that this wouldn't be a "cheap" option, but require work on 
lots of details throughout the stack - we'd need to figure out the overview 
(only include the activities button on the primary monitor? or allow an 
overview on any monitor?), get API to control the brightness of a particular 
monitor (rather than the built-in one), don't use "the monitor with the top 
bar" as indicator for the primary monitor in Settings, ...)
  "

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