Thinkpad T440p Touchpad not working

Thinkpad T440p Touchpad not working

[Mario!!]

To whom it may concern.

Hope I am communicating through the right channel.

Since about a two months ago my touchpad stop working.  At first I
thought it was a hardware problem.
I bought a new one and realized that it was not the case.
Tried to roll back to a previous kernel and I had no results.
After a some weeks of looking trough internet I realized that the
touchpad was detect by libinput (or xinput) after suspend my computer.
But still can not record or debug-evente via libinput, it just doesn´t
show any event.

I am currently using debian 12 with kernel 6.1.0-21-amd64.

## Steps to reproduce
`libinput list-devices` does not show my touchpad. After suspend it
shows the device.
If I shutdown my computer the devices is not detected again.

## Required information
- hardware information:
  - Thinkpad T440p
  - The current touchpad had separate physical hardware buttons. The
previous one hasn't, but still was not working.
- libinput (version 1.22.1):
Device:           SynPS/2 Synaptics TouchPad
Kernel:           /dev/input/event16
Group:            8
Seat:             seat0, default
Size:             98x54mm
Capabilities:     pointer gesture
Tap-to-click:     disabled
Tap-and-drag:     enabled
Tap drag lock:    disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: disabled
Calibration:      n/a
Scroll methods:   *two-finger edge
Click methods:    *button-areas clickfinger
Disable-w-typing: enabled
Disable-w-trackpointing: enabled
Accel profiles:   flat *adaptive
Rotation:         n/a

After report it in a issue
(https://gitlab.freedesktop.org/libinput/libinput/-/issues/1011) to
the libinput gitlab.
Peter Hutterer kindly point me in the right direction.

The command 'dmesg -H | grep -i TouchPad' shows:
  [  +0.000012] psmouse serio1: synaptics: Your touchpad () says it can
support a different bus. If i2c-hid and hid-rmi are not used, you
might want to try setting psmouse.synaptics_intertouch to 1 and report
this to linux-input@vger.kernel.org.
  [  +0.066526] psmouse serio1: synaptics: Touchpad model: 1, fw: 8.2,
id: 0x1e2b1, caps: 0xf006a3/0x943300/0x12e800/0x410000, board id:
3157, fw id: 2403511
  [  +0.042611] input: SynPS/2 Synaptics TouchPad as
/devices/platform/i8042/serio1/input/input25

Any idea what could possibly be going on? Anything I could try?

Thanks for your attention.


-- 
Mario Villasante Barahona