Touchpad toggle no longer functions on Lenovo devices

[Brandon Gilmore]

Recently pushed to Precise:

acpi-support (0.140.1) precise-proposed; urgency=low

  * asus-touchpad.sh: Don't handle Synaptics devices. (LP: #804109)

 -- Timo Aaltonen <email address hidden> Tue, 09 Oct 2012 13:35:58 +0300

User reports:

If you check /etc/acpi/events/lenovo-touchpad, it responds to the ACPI event of the Fn+F8 key by calling the script /etc/acpi/thinkpad-stretchortouchpad.sh, which in turns call /etc/acpi/asus-touchpad.sh, which is the file changed in this last update.

In this new version, /etc/acpi/asus-touchpad.sh tests the output of 'xinput list' against the string "PS/2 Elantech Touchpad", which doesn't match the actual device which is "SynPS/2 Synaptics TouchPad".

[Steve Langasek (vorlon)]

Timo, this seems to be a regression introduced by your latest change to acpi-support. Can you please look at this?

[Timo Aaltonen (tjaalton)]

Touchpad toggle works just fine on my T420s, that's what I used for testing the upload. What desktop do you use?

[Brandon Gilmore (bgilmore)]

This update positively broke X220 and X1 Carbon users.

% xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ SynPS/2 Synaptics TouchPad id=14 [slave pointer (2)]
⎜ ↳ TPPS/2 IBM TrackPoint id=16 [slave pointer (2)]
...

I don't have a T420s on hand to compare xinput output.

[Timo Aaltonen (tjaalton)]

Just answer the question; which desktop do you use? It's working just fine on Unity. Guessing you're using something else, which doesn't have gnome-settings-daemon that handles the hotkey for Unity & GNOME.

T420s has a synaptics.

[Brandon Gilmore (bgilmore)]

I followed up and found that my reporting user has switched to KDE (which may or may not have been the original source of the problem).