Unity loses drag and drop events during Unity panel fade

[Lem]

Unity appears to lose drag and drop events during the panel fade effect. Before the fade, and after the fade, drag and drop works perfectly.

Steps to reproduce:

1. Have a few text files on one side of the desktop, and a text editor open on the other side.
2. Drag files onto text editor to open them.
3. During the Unity panel fade animation, drag and drop will be lost.

The reason why I suggest having files and text editor on opposite sides of the desktop is to allow sufficient time for the Unity panel to decide to fade.

This issue exists in Ubuntu 12.04 Beta 2 and Ubuntu 11.10, exactly the same.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.8.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
Uname: Linux 3.2.0-21-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0-0ubuntu2
Architecture: amd64
CompizPlugins: [core,composite,opengl,decor,grid,snap,resize,place,move,mousepoll,commands,session,wall,compiztoolbox,gnomecompat,regex,imgpng,vpswitch,unitymtgrabhandles,animation,fade,expo,workarounds,ezoom,scale,unityshell]
Date: Sun Apr 1 15:28:12 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
ProcEnviron:
 LANGUAGE=en_AU:en
 TERM=xterm
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[Lem (lem-jjr)]

Small update:

This happens on systems running nVidia's binary graphics driver (GTX560), and also AMD's Catalyst (E-350), both versions from Ubuntu 12.04's repo as of April 1, 2012.

The timing is critical in reproducing this bug. After a bit more testing here, it seems once the fade animation is over half way done, drag and drop can work, but in the first half, the event will be lost.

[Jonas Finnemann Jensen (jopsen)]

I can confirm this bug on both ATI and Intel (so I doubt this is releated to the graphics driver/card).

Anyways, I recommend that we disabling this "feature" untill this is fixed. Highlighting icons is nice, but not at the expense of usuability.

This bug is very bad, because users will experience that sometimes drag 'n' drop works, whilst other times it doesn't. The bug is consistent, but the user experience is not.

[Lem (lem-jjr)]

I'm surprised this bug hasn't had more attention. Jonas, could you click "this bug affects me too" at the top of the page? That might get someone's attention :)

[Launchpad Janitor (janitor)]

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

[Lem (lem-jjr)]

This bug still exists in 14.04 (2014-01-30 fresh install from daily ISO) as of unity 7.1.2+14.04.20131106.1-0ubuntu2