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I have the following input devices:
fm@thinkpad:~$ xinput list
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ Logitech USB Receiver                   	id=10	[slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad              	id=12	[slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint                   	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)]
    ↳ Sleep Button                            	id=8	[slave  keyboard (3)]
    ↳ Logitech USB Receiver                   	id=9	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=11	[slave  keyboard (3)]
    ↳ ThinkPad Extra Buttons                  	id=14	[slave  keyboard (3)]


The touchpad is configured out of the box with the following settings:
fm@thinkpad:~$ xinput list-props 12
Device 'SynPS/2 Synaptics TouchPad':
	Device Enabled (132):	1
	Coordinate Transformation Matrix (134):	1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
	Device Accel Profile (261):	1
	Device Accel Constant Deceleration (262):	2.500000
	Device Accel Adaptive Deceleration (263):	1.000000
	Device Accel Velocity Scaling (264):	12.500000
	Synaptics Edges (278):	1760, 5310, 1636, 4442
	Synaptics Finger (279):	24, 29, 255
	Synaptics Tap Time (280):	180
	Synaptics Tap Move (281):	231
	Synaptics Tap Durations (282):	180, 180, 100
	Synaptics Tap FastTap (283):	0
	Synaptics Middle Button Timeout (284):	75
	Synaptics Two-Finger Pressure (285):	280
	Synaptics Two-Finger Width (286):	6
	Synaptics Scrolling Distance (287):	105, 105
	Synaptics Edge Scrolling (288):	0, 0, 0
	Synaptics Two-Finger Scrolling (289):	1, 1
	Synaptics Move Speed (290):	1.000000, 1.750000, 0.038030, 40.000000
	Synaptics Edge Motion Pressure (291):	29, 159
	Synaptics Edge Motion Speed (292):	1, 420
	Synaptics Edge Motion Always (293):	0
	Synaptics Off (294):	0
	Synaptics Locked Drags (295):	0
	Synaptics Locked Drags Timeout (296):	5000
	Synaptics Tap Action (297):	2, 3, 0, 0, 1, 3, 2
	Synaptics Click Action (298):	1, 1, 1
	Synaptics Circular Scrolling (299):	0
	Synaptics Circular Scrolling Distance (300):	0.100000
	Synaptics Circular Scrolling Trigger (301):	0
	Synaptics Circular Pad (302):	0
	Synaptics Palm Detection (303):	0
	Synaptics Palm Dimensions (304):	9, 199
	Synaptics Coasting Speed (305):	20.000000, 50.000000
	Synaptics Pressure Motion (306):	29, 159
	Synaptics Pressure Motion Factor (307):	1.000000, 1.000000
	Synaptics Resolution Detect (308):	1
	Synaptics Grab Event Device (309):	1
	Synaptics Gestures (310):	1
	Synaptics Capabilities (311):	1, 0, 1, 0, 0, 1, 1
	Synaptics Pad Resolution (312):	111, 67
	Synaptics Area (313):	0, 0, 0, 0
	Synaptics Noise Cancellation (314):	26, 26


However to have two finger scrolling activated I have to execute 
# xinput --set-prop --type=int --format=32 "SynPS/2 Synaptics TouchPad" "Synaptics Two-Finger Pressure" 10

Otherwise enabling two finger scroll in system-settings does not have
any effect at all. I do not think there is even a way to set this value
graphically...

Please adapt the default.

** Affects: xserver-xorg-input-synaptics (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Synaptics settings have to be adapted after installation
https://bugs.launchpad.net/bugs/849461
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