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I just installed Debian 9 on a Lenovo S130-14IGM but the touchpad doesn't work at all.

With Ubuntu there is no problem with it.

I tried everything I found on the Internet. I have no more ideas.

Here are the results from the two operating systems:

Ubuntu

# egrep -i 'syna|alps|etps|elan' /proc/bus/input/devices

N: Name="SYNA3388:00 06CB:8459 Touchpad"

P: Phys=i2c-SYNA3388:00

S: Sysfs=/devices/pci0000:00/0000:00:17.0/i2c_designware.0/i2c-4/i2c-SYNA3388:00/0018:06CB:8459.0001/input/input17



# apt list xserver-xorg-input-synaptics

Listing...

xserver-xorg-input-synaptics/bionic 1.9.0-1ubuntu1 amd64



# dpkg -l | grep -i syna

ii  xserver-xorg-input-synaptics-hwe-18.04 1.9.1-1ubuntu1~18.04.1                    amd64        Synaptics TouchPad driver for X.Org server



# xinput

⎡ Virtual core pointer                      id=2    [master pointer  (3)]

⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]

⎜   ↳ SYNA3388:00 06CB:8459 Touchpad            id=9    [slave  pointer  (2)]

⎣ Virtual core keyboard                     id=3    [master keyboard (2)]

    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]

    ↳ Video Bus                                 id=6    [slave  keyboard (3)]

    ↳ Power Button                              id=7    [slave  keyboard (3)]

    ↳ EasyCamera: EasyCamera                    id=8    [slave  keyboard (3)]

    ↳ Ideapad extra buttons                     id=10   [slave  keyboard (3)]

    ↳ AT Translated Set 2 keyboard              id=11   [slave  keyboard (3)]

Debian

# egrep -i 'syna|alps|etps|elan' /proc/bus/input/devices

-



# apt list xserver-xorg-input-synaptics

En train de lister…

xserver-xorg-input-synaptics/stable 1.9.0-1+b1 amd64





# dpkg -l | grep -i syna

ii  synaptic                              0.84.2                            amd64        Graphical package manager



# xinput

⎡ 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)]

    ↳ EasyCamera                                id=9    [slave  keyboard (3)]

    ↳ Ideapad extra buttons                     id=10   [slave  keyboard (3)]

    ↳ AT Translated Set 2 keyboard              id=11   [slave  keyboard (3)]

What should I do?

From the Debian wiki article:

Debian 9 "Stretch"

In most cases, make sure you have xserver-xorg-input-libinput xserver-xorg-input-evdev xserver-xorg-input-mouse installed, and not the xserver-xorg-input-synaptics package.

Read: https://en.wikipedia.org/wiki/Evdev for more info on evdev.

Try apt removeing xserver-xorg-input-synaptics and installing the above packages.

# egrep -i 'syna|alps|etps|elan' /proc/bus/input/devices

N: Name="SYNA3388:00 06CB:8459 Touchpad"

P: Phys=i2c-SYNA3388:00

S: Sysfs=/devices/pci0000:00/0000:00:17.0/i2c_designware.0/i2c-4/i2c-SYNA3388:00/0018:06CB:8459.0001/input/input17

Your touchpad is not connected to the system via internal PS/2 or USB wiring, but using the I2C bus. This is a fairly new development, and Debian 9's standard kernel might be too old to support such touchpads very well. You might try with a backport kernel.

See here for instructions in enabling the Debian Backports repository - basically, add this line to the /etc/apt/sources.list file:

deb http://deb.debian.org/debian stretch-backports main

Then you should be able to install a backport kernel with:

apt-get -t stretch-backports install linux-image-4.19.0-0.bpo.2-amd64 linux-image-amd64

After a reboot, you might then have better luck with your touchpad.