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I've got the Dell XPS 13 Developer Edition laptop, of which I am a big fan. My touchpad works in 17.10 without a problem, but when I boot into 18.04, I get bad behaviour. I can move the pointer, but it's jerky, and just stops following my touchpad movement.

It works fine when I boot to a 17.10 USB key. Using a USB mouse also works fine. The problem occurs when I have a USB mouse connected or not.

I get the same behaviour when I start an Xorg session or a Wayland session, so my guess is that the problem is at a lower level, like the kernel.

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    I wonder why this would be an issue only on 18.04, but can you try blacklisting the "psmouse" module? echo "blacklist psmouse" >/etc/modprobe.d/xps13mouse.conf && update-initramfs -u && reboot May 2, 2018 at 17:46
  • That stopped the mouse entirely. May 4, 2018 at 1:27
  • I think this is a good sign, because you shouldn't be using the psmouse driver. Is your touchpad listed by sudo libinput list-devices? May 4, 2018 at 6:58
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    Possible duplicate of Synaptic touchpad on laptop not working Jul 19, 2018 at 8:35

3 Answers 3

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I had the same problem (xps13, update to 18.04) and did the same as in Synaptic touchpad on laptop not working:

sudo modprobe -r psmouse
sudo modprobe psmouse proto=imps
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This fixed my Dell XPS (Cyprus touchpad) issue on Mate Ubuntu 18.04. I saw the issue in both Mate and regular Ubuntu.

sudo apt-get install xserver-xorg-core
sudo apt-get install xserver-xorg-input-synaptics
sudo apt-get install xserver-xorg-input-all

Then reboot

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I installed xf86-input-synaptics and I made some changes to /etc/X11/xorg.conf.d/70-synaptics.conf.

sudo apt-get install xserver-xorg-input-synaptics
sudo cp /usr/share/X11/xorg.conf.d/70-synaptics.conf /etc/X11/xorg.conf.d/

You can check what settings Synaptics with:

synclient -l

and you can try some settings like:

synclient TapButton1=1

I think this is not perfect, but now I can sleep well.

Ref:

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