Even though I might have a different hardware here's how to my Dell mini 1012 touchpad fully works with tap-select and so on:
$ sudo apt install sysnaptics
$ sudo vim /etc/X11/xorg.conf.d/70-synaptics.conf
Code:
# TouchPad configuration
# Details: https://wiki.archlinux.org/index.php/Touchpad_Synaptics
Section "InputClass"
Identifier "touchpad"
Driver "synaptics"
MatchIsTouchpad "on"
Option "TapButton1" "1"
#Option "TapButton2" "3"
#Option "TapButton3" "2"
Option "VertEdgeScroll" "on"
Option "VertTwoFingerScroll" "on"
Option "HorizEdgeScroll" "on"
Option "HorizTwoFingerScroll" "on"
Option "CircularScrolling" "on"
Option "CircScrollTrigger" "2"
Option "EmulateTwoFingerMinZ" "40"
Option "EmulateTwoFingerMinW" "8"
Option "CoastingSpeed" "0"
Option "FingerLow" "30"
Option "FingerHigh" "50"
Option "MaxTapTime" "125"
Option "RBCornerButton" "3"
EndSection