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[George Moutsopoulos <1290517@xxxxxxxxxxxxxxxxxx>]

Description of my bug is mouse does not work at all. Device is elantech ETD0108. Laptop is Asus TP500LN. Dmesg gives "lost sync at byte 6" messages. Mouse does work with proto=imps parameter but no two-finger functionality. If this is the same with you, after sudo su try
echo 1 > /sys/devices/platform/i8042/serio4/reg_07
(or serioX?)
and see if it fixes the issue.

For at least asus TP500LN a kernel patch is under consideration
https://bugzilla.kernel.org/show_bug.cgi?id=84491
https://www.marc.info/?t=142731893400011
Many thanks to Ulrik de Bie!

Perhaps you can post on bugzilla that it affects your laptop too.

** Bug watch added: Linux Kernel Bug Tracker #84491
   http://bugzilla.kernel.org/show_bug.cgi?id=84491

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https://bugs.launchpad.net/bugs/1290517

Title:
  Asus R751L Notebook - Touchpad not recognized

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I made a fresh install of ubuntu 13.10.
  After that dist upgraded.

  Mouse works if I attach an optical mouse. This works fine.

  My touchpad isn't recognized. Even I cannot see a tab for touchpad in settings.
  --- 
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jbc        1639 F.... pulseaudio
   /dev/snd/controlC1:  jbc        1639 F.... pulseaudio
  DistroRelease: Ubuntu 13.10
  HibernationDevice: RESUME=UUID=c218623a-1038-4589-8a9f-beb574a44cd6
  InstallationDate: Installed on 2014-03-10 (2 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: ASUSTeK COMPUTER INC. X750LB
  MarkForUpload: True
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-18-generic.efi.signed root=UUID=b2acb217-20f6-4ec8-9346-6415483140fc ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-18-generic N/A
   linux-backports-modules-3.11.0-18-generic  N/A
   linux-firmware                             1.116.2
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  Tags:  saucy
  Uname: Linux 3.11.0-18-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 10/01/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 205
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: X750LB
  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.:bvr205:bd10/01/2013:svnASUSTeKCOMPUTERINC.:pnX750LB:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX750LB:rvr1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: X750LB
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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