Quirk for 2-button mouse ASUS K451 touchpad

[Fnx]

Hi,

On ASUS K451 laptop, middle click or 3 finger-tap does not work natively.

There is no middle button on touchpad, so I am trying to emulate the middle click.

I followed these instructions from https://wiki.ubuntu.com/X/Quirks#A2-button_Mice , but it did not work:

1. Create a file named /usr/share/X11/xorg.conf.d/middle-mouse-button.conf with the following contents:

 Section "InputClass"
     Identifier "middle button emulation class"
     MatchIsPointer "on"
     Option "Emulate3Buttons" "on"
 EndSection

2. If you use GNOME 3 or Unity, an additional step is needed. Execute the following command
    gsettings set org.gnome.settings-daemon.peripherals.mouse middle-button-enabled true
Otherwise, GNOME 3's settings will override X's.

Step 2 returned:
 key « middle-button-enabled » doesn't exist

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-36.55-generic 4.4.16
Uname: Linux 4.4.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
BootLog:

CurrentDesktop: Unity
Date: Sat Sep 17 20:21:59 2016
DistUpgraded: 2016-08-28 11:12:55,512 ERROR got error from PostInstallScript ./xorg_fix_proprietary.py (L'exécution du processus fils « ./xorg_fix_proprietary.py » a échoué (Aucun fichier ou dossier de ce type))
DistroCodename: xenial
DistroVariant: ubuntu
InstallationDate: Installed on 2015-05-10 (495 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
MachineType: ASUSTeK COMPUTER INC. S451LA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-36-generic.efi.signed root=UUID=57ce6d24-cb8a-4661-ad8c-fcc5aa33c0fe ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-input-evdev
UpgradeStatus: Upgraded to xenial on 2016-08-28 (20 days ago)
dmi.bios.date: 01/17/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: S451LA.403
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: S451LA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrS451LA.403:bd01/17/2014:svnASUSTeKCOMPUTERINC.:pnS451LA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnS451LA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: S451LA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2.3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Sat Sep 17 20:02:14 2016
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 5267
 vendor CMN
xserver.version: 2:1.18.3-1ubuntu2.3