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I just bought an Dell XPS 13 and for my work I have a Macbook.

I want to use the touchpad for changing workspaces. I have found some questions but all the answers provided does not work on Ubuntu 14.04.

Is there someone that got the 3 finger swipe working for switching workspaces?

I'm running 15.04 and I got the three finger swipe working with xSwipe. I did it by following this tutorial:

Ubuntu 13.10, Mint 16, and Up

First download the following dependencies.

sudo apt-get install build-essential libevdev-dev autoconf automake libmtdev-dev xorg-dev xutils-dev libtool

Now, we need to remove the old driver so the new one will overwrite it.

sudo apt-get remove xserver-xorg-input-synaptics

Then, clone the source and build the new driver!

git clone https://github.com/felipejfc/xserver-xorg-input-synaptics.git
cd xserver-xorg-input-synaptics
./autogen.sh
./configure --exec_prefix=/usr
make
sudo make install

When this completes, reboot and make sure your pointer works.

Setting up xSwipe

First install the dependencies.

sudo apt-get install libx11-guitest-perl

Then enable SHMConfig to allow for handling of the gestures.

mkdir /etc/X11/xorg.conf.d/
sudo nano /etc/X11/xorg.conf.d/50-synaptics.conf

Fill the file with the following, and save it!

Section "InputClass"
Identifier "evdev touchpad catchall" 
Driver "synaptics" 
MatchDevicePath "/dev/input/event*" 
MatchIsTouchpad "on" 
Option "Protocol" "event"
Option "SHMConfig" "on"
EndSection

Now clone xSwipe to a location of your choosing.

git clone https://github.com/iberianpig/xSwipe.git

And change the eventkey.cfg file to your liking. EDIT: It seems in both 13.10 and 14.04 versions of Ubuntu (and any version of Cinnamon), the keys set in the "other" category are the ones that are signaled on key swipes. Ignore the ubuntu and gnome sections for unity and cinnnamon.

cd xSwipe/
nano eventkey.cfg

Now test by running:

perl xSwipe.pl

Try to swipe with different gestrues and check the terminal to see if they are working. If they are, you may now add the script to your start up programs depending on your environment. After it is added, reboot and you should have working multitouch gestures!

Update: This seems to take about an hour out of my battery life. To get around this, I change the sensitivity with the parameter -m 30.

perl xSwipe.pl -m 30

All credits go to Matthew Iannucci, find this tutorial and comments here: Whole tutorial

If this does not work for you, you can try the tutorial of iberianpig, who made xSwipe. -> Tutorial

If you want to configure the gestures look here: -> https://github.com/iberianpig/xSwipe/wiki/Customize-eventKey.cfg

Here is my eventKey.cfg already configured for the 3 finger workspace swipe: http://pastebin.com/f1E1L26V