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i have installed ubuntu 12.04 but when i got to mouse settings, touchpad tab is missing. Ubuntu detects it.

shahzeb@shahzeb-laptop:~$ xinput list
⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ PS/2 Synaptics TouchPad                   id=11   [slave  pointer  (2)]
⎜   ↳  USB OPTICAL MOUSE                        id=13   [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ HP Webcam                                 id=9    [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=10   [slave  keyboard (3)]
    ↳ HP WMI hotkeys     

                    id=12   [slave  keyboard (3)]

I am using HP Dv6. Kindly help me, i shall be thankful.

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I have the same problem here. mine's Aspire One d255 and my touchpad tab in the settings is missing too. It was well a while back and it's now gone. – user140103 Mar 13 '13 at 23:57

There might be something wrong with your driver.

Check if xserver-xorg-input-synaptics is installed.

or do the following:

  1. Enable SHMConfig
    • Change the value for SHMConfig to true by editing the 50-synaptics.conf file.
    • /usr/share/X11/xorg.conf.d/50-synaptics.conf
      // It might look like this:
      Section "InputClass"
           Identifier "touchpad catchall"
           Driver "synaptics"
           MatchIsTouchpad "on"
           MatchDevicePath "/dev/input/event*"
                 Option "TapButton1" "1"
                 Option "TapButton2" "2"
                 Option "TapButton3" "3"
                 Option "SHMConfig"  "true"
    • or
    • Open a terminal and type:
    • synclient SHMConfig=1
  2. Install gsynaptics from the universe repository.
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