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At some point my touchpad stopped working on Lenovo x220 under Ubuntu 11.10, after login.

I have found two possible solutions for that online, but neither of them work.

First, gconftool-2 --set --type boolean /desktop/gnome/peripherals/touchpad/touchpad_enabled true and a second one, xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Synaptics Off" 8 0

After looking more carefully into xinput I have realized that xinput list-props "SynPS/2 Synaptics TouchPad" outputs:

Device Enabled (132): 0

This field seems to be stuck to zero, because trying to set it back to 1 by: xinput set-int-prop "SynPS/2 Synaptics TouchPad" "Device Enabled" 8 1 doesn't seem to have any effect, e.g. I still have:

Device Enabled (132): 0

Any ideas? Thank you!

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Could you try synclient TouchpadOff=0? – grawity Feb 1 at 19:37
I just tried that and I get a very strange behaviour (after a few seconds it comes back to 1, also the touchpad is not working during these seconds): $ synclient TouchpadOff=0 $ synclient -l | grep Touch TouchpadOff = 0 $ synclient -l | grep Touch TouchpadOff = 0 $ synclient -l | grep Touch TouchpadOff = 1 – Maria Mateescu Feb 8 at 13:46
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2 Answers

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Try setting org.gnome.settings-daemon.peripherals.touchpad.touchpad-enabled to true with dconf-editor.

(Source)

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Great, this finally worked!! Thank you very much! – Maria Mateescu Feb 15 at 11:01
@MariaMateescu If it worked, accept the answer by clicking on the tick to the left of the answer. – Bob Apr 15 at 11:30
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up vote 0 down vote

Having absolutely the same configuration (Lenovo x220/Ubuntu 11.10) and experiencing the same issue, I've done the following: I checked out what goes out to standard output when i press FN+F8 (Touchpad off shortcut) using:

xinput --watch-props 11

(11 is my device id from "xinput list" command)

What i should get when disabling touchpad:

Property 'Synaptics Off' changed.
Synaptics Off (286):    1
Property 'Device Enabled' changed.
    Device Enabled (132):   0
Property 'Device Enabled' changed.
    Device Enabled (132):   0

What i got this time: 

Property 'Synaptics Off' changed.
Synaptics Off (286):    1
Property 'Device Enabled' changed.
    Device Enabled (132):   1
Property 'Device Enabled' changed.
    Device Enabled (132):   1

So it's a list of mutual excluded parameters.

What i did: 

xinput --set-prop 11 'Synaptics Off' 0

And everything worked fine after that, even after logout.

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