Dragging applications from dash to launcher works only on leftmost screen

[Sami Haahtinen]

For a while now I've been wondering why I can't drag applications from dash to launcher. Today I figured out that I had to do it on the secondary (leftmost) screen for drag&drop to work.

Steps to reproduce:
 1. set up 2 screens in a side by side configuration
 2. open dasher in right screen
 3. drag an application to launcher

If the same is done on the left screen, application is added to the launcher.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.10.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14
Uname: Linux 3.2.0-22-generic x86_64
ApportVersion: 2.0.1-0ubuntu3
Architecture: amd64
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: Sat Apr 14 22:11:30 2012
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2011-12-27 (109 days ago)

[Sebastien Bacher (seb128)]

Thank you for your bug report. Do you use unity-3d or 2d? How are configured your screen? Do you have a launcher showing on each? What happens if you ddn from the dash to the launcher on the screen on the right? Here it works fine on both screens...

[Sami Haahtinen (ressu)]

Hi,

On Mon, Apr 23, 2012 at 14:59, Sebastien Bacher <email address hidden> wrote:
> Do you use unity-3d or 2d?

This is reproduced with 3D

> How are configured your screen?

VGA-0 connected 1920x1080+0+0 (normal left inverted right x axis y
axis) 531mm x 299mm
DVI-0 connected 1920x1080+1920+0 (normal left inverted right x axis y
axis) 531mm x 299mm

So that is 2 screens side by side.

> Do you have a launcher showing on each?

Yes.

> What happens if you ddn from the dash to the launcher on the screen on the
> right? Here it works fine on both screens...

Hmm.. now it's being inconsistent in behaviour.

When the drag&drop the other icons move out of the way, but dropping
the item to launcher just returns the launcher to the initial state.

I've also been able to get an empty icon to the launcher and it even
works part of the time..

I'm starting to become convinced that it has nothing to do with the
second display, but it's about something else completely. I've been
trying to drag & drop file roller (just to make sure that the icon
doesn't affect it) and sometimes it fails and sometimes it doesn't..

Any ideas on how to start debugging this?

--
Sami Haahtinen
Bad Wolf Oy
[phone]

[Sebastien Bacher (seb128)]

that starts looking a bit like bug #978392...

[Sami Haahtinen (ressu)]

The more I try to break it, Unity behaves more and more like described in bug #978392 marking as duplicate.