I am affected by the bug without having upgraded from trusty to xenial.
I simply upgraded from kernel 3.13 to kernel 4.4 maintaining the Trusty
release.
After the kernel upgrade the touchpad of my Dell XPS 13 ( version 9333 -
2014 ) is no more recognized as a valid input source for the xserver.
It is useful to point out that I also own a newer Dell XPS 13 ( version
9350 -2016 ); the machine came with a more recent trusty version (
Ubuntu 14.04.5 LTS ). After upgrading from kernel 3.19 to kernel 4.4 the
touchpad is still working without a glitch.
I guess that something has gone wrong when upgrading the kernel in the
older machine.
I tried to install package xserver-xorg-input-synaptics with the
following result:
sudo apt-get install xserver-xorg-input-synaptics
The following packages have unmet dependencies.
xserver-xorg-input-synaptics : Depends: xorg-input-abi-20
Depends: xserver-xorg-core (>= 2:1.14.99.902)
E: Unable to correct problems, you have held broken packages.
It is likely that the actual origin of the bug lies in the above
mentioned broken packages ...
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1629613
Title:
[Dell XPS 13] SynPS/2 Synaptics TouchPad not recognized after upgrade
from 14.04 to 16.04
Status in linux package in Ubuntu:
Confirmed
Bug description:
* Touchpad doesn't work at all (No response from the Touchpad)
* Tried using external mouse and it works fine
* Cannot find "SynPS/2 Synaptics TouchPad" in "cat /proc/bus/input/devices"
OS: Ubuntu 16.04.1 LTS
kernel version: 4.4.0-38-generic
Laptop Model: Dell XPS 13 - 93333
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