Elantech touchpad acting randomly on MSI CR70-2M

[Yodhur]

I have a disturbing bug. My touchpad left click (tapping and mechanical) stops working sometimes. It seems to be linked to click and drag and/or right click. Login out and back in solve the problem. I have control of the left click again (although mechanical click sometime don't work back).
Usualy, it don't work when I start the computer. I log on the invited profile then back in mine. And it work for a while.

My laptop is a MSI CR70 2M - french keyboard. The touchpad is detected as an Elantech touchpad.
My system is Ubuntu 14.04.1 LTS

I have some log file: evtest- xev - xinput - xmodmap - Xorg.log (I have followed https://wiki.ubuntu.com/DebuggingTouchpadDetection)

evtest : paste.ubuntu.com/7980447
xev : paste.ubuntu.com/7980457
xinput : paste.ubuntu.com/7980463
xmodmap : paste.ubuntu.com/7980465
Xorg.log : paste.ubuntu.com/7980467

I can provide anymore information you may need.

Thank you a lot for the job done for Ubuntu.

Regards,

Yodhur

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xinput 1.6.1-1
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Tue Aug 12 17:05:13 2014
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0406] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:10e9]
InstallationDate: Installed on 2014-07-22 (20 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Micro-Star International Co., Ltd. CR70 2M/CX70 2OC/CX70 2OD
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic.efi.signed root=UUID=284cbe58-eeab-4685-8abd-df1484ab5a5c ro quiet splash vt.handoff=7
SourcePackage: xinput
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/21/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: E1758IMS.10G
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: MS-1758
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: REV:1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: CR70 2M/CX70 2OC/CX70 2OD
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrE1758IMS.10G:bd02/21/2014:svnMicro-StarInternationalCo.,Ltd.:pnCR702M/CX702OC/CX702OD:pvrREV1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMS-1758:rvrREV1.0:cvnCR702M/CX702OC/CX702OD:ct10:cvrN/A:
dmi.product.name: CR70 2M/CX70 2OC/CX70 2OD
dmi.product.version: REV:1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Tue Aug 12 16:59:07 2014
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 855
 vendor LGD
xserver.version: 2:1.15.1-0ubuntu2

[Yodhur (yodhur)]

Hello,

I had a kernel upgrade yesterday and now, the touchpad is not working. I have no click at all. Nor left or right. The problem seems linked to the kernel for me but I don't know. Should I update this bug report or fill in a new report bug connected to the new kernel?
What is your advise?

(I am not currently on the incriminated computer, I can provide informations as soon as I get back to it).

Thank you.