Comment 7 for bug 1670492

Some more debug info:

$ sudo dmidecode -t 21

# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 3.0.0 present.

Handle 0x0035, DMI type 21, 7 bytes
Built-in Pointing Device
 Type: Track Point
 Interface: PS/2
 Buttons: 3

Handle 0x0036, DMI type 21, 7 bytes
Built-in Pointing Device
 Type: Touch Pad
 Interface: PS/2
 Buttons: 2

$ cat /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/input77
U: Uniq=
H: Handlers=mouse0 event4
B: PROP=5
B: EV=b
B: KEY=e520 10000 0 0 0 0
B: ABS=660800011000003

I: Bus=0011 Vendor=0002 Product=000a Version=0000
N: Name="TPPS/2 IBM TrackPoint"
P: Phys=synaptics-pt/serio0/input0
S: Sysfs=/devices/platform/i8042/serio1/serio6/input/input78
U: Uniq=
H: Handlers=mouse1 event14
B: PROP=21
B: EV=7
B: KEY=30000 0 0 0 0
B: REL=3
[...]