I recently installed ubuntu 18.0.4 on my new laptop and the touchpad stops responding after closing the lid.
The device name is SYNA7DB5:00 06CB:CD41 Touchpad The device driver is xserver-xorg-input-libinput-hwe-18.04/bionic-updates,now 0.28.1-1~18.04.1 amd64
I tried installing xserver-xorg-input-synaptics, but that prevented the touchpad from working altogether.
I also tried disabling and re-enabling the touchpad using xinput commands but that doesn't fix the issue either.
From /proc/bus/input/devices
I: Bus=0018 Vendor=06cb Product=cd41 Version=0100
N: Name="SYNA7DB5:00 06CB:CD41 Touchpad"
P: Phys=i2c-SYNA7DB5:00
S: Sysfs=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-2/i2c-SYNA7DB5:00/0018:06CB:CD41.0005/input/input20
U: Uniq=
H: Handlers=mouse1 event9
B: PROP=5
B: EV=1b
B: KEY=e520 10000 0 0 0 0
B: ABS=2e0800000000003
B: MSC=20
Any Ideas?