unity launcher displays on both monitors

Bug #944525 reported by Nick Adams on 2012-03-02
104
This bug affects 22 people
Affects Status Importance Assigned to Milestone
unity (Ubuntu)
Undecided
Unassigned

Bug Description

I have a u36sd running the latest ubuntu 12.04 beta 1 image. The unity bar displays on both monitors when I have my laptop plugged into an external display via hdmi (other methods of connection untested).

See screenshot bbelow
http://i.imgur.com/jRs42.png

Expected result: unity launcher displays only on primary monitor

actual result: unity launcher is visible on both monitors

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.4.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
ApportVersion: 1.93-0ubuntu2
Architecture: amd64
CasperVersion: 1.305
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
Date: Fri Mar 2 03:08:17 2012
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

Nick Adams (nwadams) wrote :
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in unity (Ubuntu):
status: New → Confirmed
Rocko (rockorequin) wrote :

Yes, I have the same issue. Is this intentional behaviour? Is it configurable?

damaex (maximilian-weber) wrote :

I have the same issue.

http://i.imgur.com/SL3DU.jpg

any useful information I can provide?

Rocko (rockorequin) wrote :

Reading around a bit, it looks like this is intentional behaviour - and even considered to be improved support for multi-monitor setups! It's a pity that you can't configure it.

There are two issues that I see:

1. You might not want to have the launcher displayed on every monitor.
2. With left-right monitor setups, you have to 'brute-force' the mouse across the launcher each time you move it across screens.

I worked around the brute-force problem by setting my second monitor to be above the primary monitor - I still get the launcher on both screens but it's more workable than a left-right configuration.

Another workaround for the brute-force problem suggested on the ayatana design mailing list is to reduce these settings:

/apps/compiz-1/plugins/unityshell/screen0/options/stop_velocity
/apps/compiz-1/plugins/unityshell/screen0/options/reveal_pressure

Matthias Langer (mlangc) wrote :

If this is intentional behavior, this is just stupid! I don't connect a second monitor to my computer, to duplicate stuff from the first one.

Rocko (rockorequin) wrote :

It is also a bit inconsistent - although the launchers appear on both monitors, the systray icons in the unity top bar only appear on one monitor (in my case, the secondary monitor).

I don't mind having the launcher on both screens for a up-down configuration, but for left-right I find it just plain crazy.

Nick Adams (nwadams) wrote :

ya, the behavior is indeed intentional. However I believe it should at the very least be configurable.

damaex (maximilian-weber) wrote :

Nick Adams, Rocko... do you guys have any official sources about your statement. I can't imagine this behavior being intentional. Where is the advantage of two launchers?

Nick Adams (nwadams) wrote :

http://www.webupd8.org/2012/02/unity-52-released-with-multi-monitor.html

that's as good as I can find. I do remember seeing it somewhere else though.

There is also an ubuntu forums thread about it now. hopefully we can get some more attention.
http://ubuntuforums.org/showthread.php?t=1936155

Omer Akram (om26er) wrote :

duplicate bug 950136

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