On a quite similar Fujitsu Lifebook SH531, the same problem exists, the touchpad
is detected as a generic PS/2 mouse and scrolling does not work in X.

Adding "i8042.nomux" to GRUB_CMDLINE_LINUX in /etc/default/grub and
executing "update-grub" makes the touchpad being detected as such by the
kernel (/proc/bus/input/devices):

I: Bus=0011 Vendor=0002 Product=0007 Version=01b1
N: Name="SynPS/2 Synaptics TouchPad"
P: Phys=isa0060/serio1/input0
S: Sysfs=/devices/platform/i8042/serio1/input/input10
U: Uniq=
H: Handlers=mouse0 event10 
B: PROP=9
B: EV=b
B: KEY=6420 30000 0 0 0 0
B: ABS=260800011000003

But the touchpad will not work, neither with "evtest" nor in X, instead, the 
kernel
produces a lot of:

Sep 21 22:22:46 sh531-joachim kernel: [   50.895201] psmouse.c: bad data
from KBC - timeout

messages.

When in addition, "i8042.notimeout" is added to GRUB_CMDLINE_LINUX in 
/etc/default/grub
(and update-grub was called), the touchpad works correctly and vertical 
scrolling works too e.g. in chrome 
when moving the finger on the right boarder of the touchpad. "xinput" calls 
also allowed me
to enable two finger scrolling, but that is already described elsewhere in 
detail.

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https://bugs.launchpad.net/bugs/838105

Title:
  'Synaptics TouchPad V7.2' incorrectly detected as PS/2 mouse in
  'Fujitsu Lifebook LH531'

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