I just bought an Asus X750JA with windows installed. I decided to use Ubuntu Gnome. The problem is that Ubuntu didn't installed the touchpad drivers. The pad is recognized, but the functions of scrolling, zooming and others are not available. The PC uses Asus Smart Gesture V2.2.19 drivers on Windows, but I don't know which Synaptics driver would work. Thank you in advance for your time
Asus laptops are shipped with various touchpads. At this moment it look like mostly they are Elantech and Focaltech. Elantech touchpads are fully supported in kernel 3.16. If you installed Ubuntu 14.04.2, it should be already there. Focaltech touchpads are supported from kernel 4.0, which is not in any Ubuntu release yet. It is looking like this is your case.
You can test it by running
dmesg | grep pnp
If you have FLT0101, FLT0102 or FLT0103, you have a supported Focaltech touchpad.
I backported Focaltech driver to Ubuntu kernels 3.16 and 3.19 and made a dkms driver for 3.19. Also I made a PPA with a dkms driver. It works for Ubuntu 15.04 and 14.04.
The driver can be installed by
sudo add-apt-repository ppa:hanipouspilot/focaltech-dkms sudo apt-get update sudo apt-get install focaltech-dkms
For Ubuntu 14.04 it will install 3.19 kernel.
If there are no issues with 3.19 kernel, I recomend to remove linux meta packages of older kernels. Otherwise they will update too and report errors, when focaltech-dkms does not build.
These are linux-image-generic-lts-utopic and linux-headers-lts-utopic for 3.16.
linux-image-generic and linux-headers-generic for 3.13.
UPDATE: These touchpads are now supported by the 4.2 kernels. The kernel can be installed by
sudo apt-get install linux-generic-lts-wily
The Focaltech driver from the PPA should be removed.