Gfilui

so after updating my system from 16.04 to 17.10 and then to 18.04, my touchpad is not working anymore (this already happened upgrading to 17.04, but I thought a further upgrade might solve the issue).
By "not working" I mean first of all that the cursor does not move and also that there seems to be no "invisible cursor", that might open menus, etc.

Here's some output that might be helpful:
cat /proc/bus/input/devices gives

I: Bus=0019 Vendor=0000 Product=0005 Version=0000
N: Name="Lid Switch"
P: Phys=PNP0C0D/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input0
U: Uniq=
H: Handlers=event0 
B: PROP=0
B: EV=21
B: SW=1

I: Bus=0019 Vendor=0000 Product=0003 Version=0000
N: Name="Sleep Button"
P: Phys=PNP0C0E/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input1
U: Uniq=
H: Handlers=kbd event1 
B: PROP=0
B: EV=3
B: KEY=4000 0 0

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=LNXPWRBN/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input2
U: Uniq=
H: Handlers=kbd event2 
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

I: Bus=0011 Vendor=0001 Product=0001 Version=ab41
N: Name="AT Translated Set 2 keyboard"
P: Phys=isa0060/serio0/input0
S: Sysfs=/devices/platform/i8042/serio0/input/input3
U: Uniq=
H: Handlers=sysrq kbd event3 leds 
B: PROP=0
B: EV=120013
B: KEY=402000000 3803078f800d001 feffffdfffefffff fffffffffffffffe
B: MSC=10
B: LED=7

I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input12
U: Uniq=
H: Handlers=kbd event4 
B: PROP=0
B: EV=3
B: KEY=3e000b00000000 0 0 0

I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1e/LNXVIDEO:01/input/input13
U: Uniq=
H: Handlers=kbd event5 
B: PROP=0
B: EV=3
B: KEY=3e000b00000000 0 0 0

I: Bus=0011 Vendor=0002 Product=0012 Version=0000
N: Name="FocalTechPS/2 FocalTech Touchpad"
P: Phys=isa0060/serio4/input0
S: Sysfs=/devices/platform/i8042/serio4/input/input11
U: Uniq=
H: Handlers=mouse0 event6 
B: PROP=5
B: EV=b
B: KEY=e520 10000 0 0 0 0
B: ABS=260800010000003

I: Bus=0019 Vendor=1043 Product=0000 Version=0000
N: Name="Asus Wireless Radio Control"
P: Phys=asus-wireless/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/ATK4002:00/input/input14
U: Uniq=
H: Handlers=rfkill kbd event7 
B: PROP=0
B: EV=3
B: KEY=80000000000000 0 0 0

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card1/input15
U: Uniq=
H: Handlers=event8 
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel PCH Headphone"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1b.0/sound/card1/input16
U: Uniq=
H: Handlers=event9 
B: PROP=0
B: EV=21
B: SW=4

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel HDMI HDMI/DP,pcm=3"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:03.0/sound/card0/input17
U: Uniq=
H: Handlers=event10 
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel HDMI HDMI/DP,pcm=7"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:03.0/sound/card0/input18
U: Uniq=
H: Handlers=event11 
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel HDMI HDMI/DP,pcm=8"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:03.0/sound/card0/input19
U: Uniq=
H: Handlers=event12 
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel HDMI HDMI/DP,pcm=9"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:03.0/sound/card0/input20
U: Uniq=
H: Handlers=event13 
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="HDA Intel HDMI HDMI/DP,pcm=10"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:03.0/sound/card0/input21
U: Uniq=
H: Handlers=event14 
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="Asus WMI hotkeys"
P: Phys=asus-nb-wmi/input0
S: Sysfs=/devices/platform/asus-nb-wmi/input/input22
U: Uniq=
H: Handlers=rfkill kbd event15 
B: PROP=0
B: EV=100013
B: KEY=1000000080000 0 800000000000 0 0 a1606f00900000 8200027800501000 e000000000000 0
B: MSC=10

I: Bus=0003 Vendor=064e Product=9700 Version=0101
N: Name="USB2.0 UVC HD Webcam: USB2.0 UV"
P: Phys=usb-0000:00:14.0-5/button
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-5/1 5:1.0/input/input23
U: Uniq=
H: Handlers=kbd event16 
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0

xinput gives

⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [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)]
 ↳ Asus Wireless Radio Control id=7 [slave keyboard (3)]
 ↳ Video Bus id=8 [slave keyboard (3)]
 ↳ Video Bus id=9 [slave keyboard (3)]
 ↳ Sleep Button id=10 [slave keyboard (3)]
 ↳ USB2.0 UVC HD Webcam: USB2.0 UV id=11 [slave keyboard (3)]
 ↳ Asus WMI hotkeys id=12 [slave keyboard (3)]
 ↳ AT Translated Set 2 keyboard id=13 [slave keyboard (3)]

Any help would be appreciated

Found the answer to my question here:
https://ubuntuforums.org/showthread.php?t=2322413

In short: Running
sudo apt-get install xserver-xorg-input-synaptics
and restarting the system solved it.

Thanks anyways.