Public bug reported:

I have a presentation originally created in Libreoffice Impress, which
stalls at a certain slide. This slide has a three-line text block to be
shown via user defined animation by a mouse click. However, when
clicked, this text block is NOT shown, and furthermore, the whole
presentation stalls, i.e. any further clicks do not result in showing
further elements/pages.

The full presentation could be run successfully on every Ubuntu computer
I tried it on, and with various versions of libreoffice, and even runs
on Windows computers after converting to the powerpoint format.

The exception is my latest DELL XPS13 laptop with Ubuntu 15.04, where
the stall happens.

I was successful in removing almost everything from the presentation and
still show the problem in a very simple presentation, basically
consisting of the problematic slide only (plus 2 dummy slides). This
demo presentation is attached.

After the presentation is started, the first click shows the vertical,
arrowed line, the second should zoom up the textbox, but does not.
Strangely, when the third line of this text box is removed, it works.

This demo was tested on the following systems:
12.04.5 LTS, kernel 3.13.0-58, working ok 
14.04.2 LTS, kernel 3.19.0-25, working ok
15.04,____ , kernel 3.19.0-25, NOT working (tried with Cinnamon, Gnome 
Flashback, MATE desktops)

Libreoffice in all cases is 4.4.5.2 40m0(Build 2) .

When in the 15.04 kernel example libreoffice is started via the command
line, the following output is printed in the terminal once after
starting the presentation on first slide, and then the THIRD click is
made:

ullix@xps13m15:~$ libreoffice test3line.odp

** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Unknown event notification 38

** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Unknown event notification 38

** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called


** (soffice:4253): WARNING **: Invalidate all children called

ullix@xps13m15:~$

** Affects: libreoffice (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "test3line.odp"
   
https://bugs.launchpad.net/bugs/1479817/+attachment/4436222/+files/test3line.odp

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https://bugs.launchpad.net/bugs/1479817

Title:
  Libreoffice stalls presentation on 3-liner text block in 15.04 but not
  in 14.04 and not in 12.04

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