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[Amikazet <andrefmg@xxxxxxxxx>]

hello, i have an Asus X550L and i have the same problem, but i search
and i found an little solution, dont work 2 finger but is better than
nothing.

the solution is in this website: http://askubuntu.com/questions/470388
/how-do-i-get-the-touchpad-working-on-an-asus-x450l

#####################################
Work Around
Credit to Hans De Goede (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1314198/comments/31)

This should enable the mouse to work as a normal touchpad mouse, so no
multi-touch.

You need to add a Kernel Boot Parameter to set the flag
psmouse.proto=bare which will enable PS/2 Mouse Emulation mode on your
touchpad.

To do this you can edit your default grub file.

sudo nano /etc/default/grub

Find the line that mentions GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
(or something similar) and add the flag to the end of the quoted string.

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash psmouse.proto=bare"

Then save the file and run a grub update.

sudo update-grub

Then restart the system and (hopefully) enjoy your new touchpad in PS/2
Emulation Mode.

This is a temporary fix as Hans De Goede mentions, this isn't a trivial
fix. If I'm reading the situation correctly, support for the software
that handled the touchpad used in the ASUS 550 range (and some other
models) was deprecated in 14.04 and a suitable replacement hasn't yet
been developed. So for now we don't get multi-touch in 14.04.

Having struggled with this for a while and finding nothing but launchpad
bug reports, I'm pretty happy to finally have a working touchpad even if
it doesn't have multi-touch!

###########################

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https://bugs.launchpad.net/bugs/1325881

Title:
  [Asus X550LD] Touchpad not working/detected Ubuntu 14.04

Status in linux package in Ubuntu:
  Triaged

Bug description:
  Touchpad is detected as "PS/2 Logitech Wheel Mouse". The pointer is moving itself every three seconds a cm to the left side of the screen. Can't make anything with it. No moving of cursor, no clicking.
  Also tried the newest upstream-kernel rc8 without any positive results.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-27-generic 3.13.0-27.50
  ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
  Uname: Linux 3.13.0-27-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jibba      1820 F.... pulseaudio
   /dev/snd/controlC1:  jibba      1820 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Jun  3 11:02:01 2014
  HibernationDevice: RESUME=UUID=8565074e-439a-43bc-942f-c601146e3278
  InstallationDate: Installed on 2014-05-15 (18 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: ASUSTeK COMPUTER INC. X550LD
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic.efi.signed root=UUID=8485f9a5-8383-4eb2-8965-b2b55dc40c51 ro quiet splash acpi_backlight=vendor vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-27-generic N/A
   linux-backports-modules-3.13.0-27-generic  N/A
   linux-firmware                             1.127.2
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/17/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: X550LD.300
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: X550LD
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX550LD.300:bd01/17/2014:svnASUSTeKCOMPUTERINC.:pnX550LD:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX550LD:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: X550LD
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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