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[bg <1342561@xxxxxxxxxxxxxxxxxx>]

I found a workaround which should make the touchpad work in ps/2 mouse
emulation mode.

https://bugzilla.redhat.com/show_bug.cgi?id=1110011

You need to add a Kernel Boot Parameter to set the flag i8042.nomux=1 psmouse.proto=bare
which will enable PS/2 Mouse Emulation mode on your touchpad.

Edit your default grub file.

sudo nano /etc/default/grub

Find the line that mentions GRUB_CMDLINE_LINUX and add the flag:

GRUB_CMDLINE_LINUX="i8042.noloop=1 psmouse.proto=bare"

Then save the file and run a grub update.

sudo grub-update

Then restart the system .

product: X750LN
Linux version 3.13.0-36-generic

Distributor ID: Ubuntu
Description:    Ubuntu 14.04.1 LTS
Release:        14.04
Codename:       trusty


** Bug watch added: Red Hat Bugzilla #1110011
   https://bugzilla.redhat.com/show_bug.cgi?id=1110011

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https://bugs.launchpad.net/bugs/1342561

Title:
  [Asus X750LN] Touchpad not recognized

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  The touchpad is not recognized. Either of the following do not provide a work around:
  psmouse.proto=bare
  i8042.noaux i8042.reset

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.46
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     3866 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     3866 F.... pulseaudio
  CasperVersion: 1.340
  CurrentDesktop: Unity
  Date: Wed Jul 16 06:59:29 2014
  LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: ASUSTeK COMPUTER INC. X750LN
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: file=/preseed/username.seed boot=casper persistent initrd=/casper/initrd.lz quiet splash -- debian-installer/language=de keyboard-configuration/layoutcode?=de
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/01/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 202
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: X750LN
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr202:bd04/01/2014:svnASUSTeKCOMPUTERINC.:pnX750LN:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX750LN:rvr1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: X750LN
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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