[Xorg Libinput] Touchpad doesnt work after update

hello, it’s my first post in this forum.
I get a trouble with my touchpad after a update. I dont use it a lot because i work with my mouse so i never notified that before today. I googled the problem and i found no answer. So maybe it"s a bug.

My laptop is “acer aspire 5 a514-52 k-35j2”

Kernel version uname -a

Linux aspire 5.10.32-1-MANJARO #1 SMP Wed Apr 21 14:54:10 UTC 2021 x86_64 GNU/Linux

First I thought he was a problem about updating driver, so i update the system with pacman -Syu and check for drivers installed like libinput:

libinput 1.17.1-1
xf86-input-libinput 1.0.1-1

I try to reinstall but nothing change

So I’ve checked if the problem if my touchpad was detected by the kernel.

The complete file is linked to https://pastebin.com/tYKBiLG6

You can find:

  1. cat /proc/bus/input/devices
  2. xinput list
  3. Xorg log

I dont know where the problem is after try to reinstall package, check if some conf file rewrite on Xorg, the log file i’m not a specialist.

The coherent behavior is when the mouse is connected, then the touchpad is disabled … Maybe there is an event that triggered that even tho you had not set it that way. Maybe after upgrading the kernel version you have to Ctrl+Fn+F7 to enter BIOS settings and disable secure boot. Maybe you will have to see from this point on and try that script Touchpad Synaptics - ArchWiki

I also have the same problem from time to time, and from second to last update.
Usually I don’t use a mouse, but fortunately, my Thinkpad also has a trackpoint between the keyboard keys, so I can move the pointer, open the konsole and type the following commands:

sudo modprobe -r psmouse

sudo modprobe psmouse

After that, the touchpad starts working right away.

For the moment I have solved it using kernel 5.4 and not 5.10; the first is not affected by this problem.

Does sudo libinput list-devices show the device? Does sudo libinput debug-events react when you use the touchpad?