'SynPS/2 Synaptics TouchPad' doesn't work 'Lenovo Thinkpad T440p' after the kernel upgrade

[Omer Rajput]

Hi all,

I have been using Xubuntu 16.04 since June 2016 on my Lenovo Thinkpad T440p (i5-4210M, 16GB RAM, NVIDIA 730M). However since last year (probably after a kernel upgrade), my touchpad has stopped working (I always keep the system upgraded via apt update/upgrade. It doesn't work at all, and I have to use an external mouse. As per the description at https://wiki.ubuntu.com/DebuggingTouchpadDetection,
Only very rarely, it somehow works as well (by rare I mean twice in the last two years), but as soon as I reboot, the state is back to non-working at all.

I attach an archive touchpad_debug.tar.gz containing two sub-folders working_state and nonworking_state. Each folder contains the dmesg output, my /proc/bus/input/devices, and my /var/log/Xorg.0.log when the touchpad was working and not working. In working_state, I additionally have the outputs to "xmodmap -pp", "xinput --list ", and "xinput --list-props <id>".

Regards,
Omer

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1763754

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.