Ubuntu – Touch-pad’s two finger scrolling not working after sleep sometimes in Lenovo ThinkPad X1 carbon

My Toshiba U400 has the same problem. Even install gpointing-device-settings didn't work, although at least the option to enable it wasn't greyed out there.

In the end, I found this forum post, which highlighted this little shell script :

#!/bin/bash
#
# list of synaptics device properties http://www.x.org/archive/X11R7.5/doc/man/man4/synaptics.4.html#sect4
# list  current synaptics device properties: xinput list-props '"AlpsPS/2 ALPS GlidePoint"'
#
sleep 5 #added delay... 
xinput --set-prop --type=int --format=32 "AlpsPS/2 ALPS GlidePoint" "Synaptics Two-Finger Pressure" 125
xinput --set-prop --type=int --format=32 "AlpsPS/2 ALPS GlidePoint" "Synaptics Two-Finger Width" 0         # Below width 1 finger touch, above width simulate 2 finger touch. - value=pad-pixels
xinput --set-prop --type=int --format=8  "AlpsPS/2 ALPS GlidePoint" "Synaptics Two-Finger Scrolling" 1 0   # vertical scrolling, horizontal scrolling - values: 0=disable 1=enable
exit

It works for some models, not for others, however. Good luck.

According with this answer, you can enable both two finger scrolling and edge scrolling using the following commands in terminal:

synclient VertEdgeScroll=1
synclient VertTwoFingerScroll=1

The problem is that these commands are not persistent after a system restart. To prevent this, let's put them to run at start up.

First, make a new small bash script called scrolling with the following code inside:

#!/bin/bash

synclient VertEdgeScroll=1
synclient VertTwoFingerScroll=1

Save it in your ~/bin directory, and don't forget to make it executable using the following command in terminal:

chmod +x ~/bin/scrolling

Second, search for Startup Applications in Dash, and open it:

Then add the script scrolling to run at startup: