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T440/p CLUNKPAD: Pics and installation of T450 Synaptics and Alps Touchpad+buttons

T430 and later, plus T530 and later series specific matters only
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RealBlackStuff
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T440/p CLUNKPAD: Pics and installation of T450 Synaptics and Alps Touchpad+buttons

#1 Post by RealBlackStuff » Thu Aug 16, 2018 2:34 pm

Got my hands an a T440p with clunkpad and -more important- FHD IPS.
That clunkpad needs to go, I want the Trackpoint buttons!

Here are some pictures of the back of a T450/T550 Synaptics and Alps Touchpad + 3 buttons.

Comparing Synaptics (left) vs. Alps (right):
Image

Notice the dotted (Syn) vs. the smooth (Alps) backplate.

Here's a link to more and larger of these pictures: https://imgur.com/a/z5TgiBI
In the larger pictures, please note the differences in the red/blue key insides!
I hope this will help you getting the right one for YOU.


WARNING: added 08/30/2018
even though this eBayer vikytammy shows a real Synaptics touchpad+buttons from a T450,
what they ship you is an Alps touchpad! https://www.ebay.com/itm/162912148567

If you did order and find you got cheated ("not as described"), tell them it doesn't work.
I did, and I got my money back, without having to return it.

HOWEVER, before I started hunting again for the real McCoy, I tried it with some ALPS drivers, and you know what? It worked!
I don't use the touchpad, I just want those 3 buttons for use with the Trackpoint, so in the end I'm happy enough.
FYI: I described the ALPS install further down.

RealBlackStuff
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Re: T440/p CLUNKPAD: Pictures of T450 Synaptics and Alps Touchpad+buttons

#2 Post by RealBlackStuff » Sat Sep 01, 2018 11:21 am

How to install a T450 Synaptics touchpad+buttons driver in a T440/T440p:

1. Download the latest Synaptics T450 driver from Lenovo, do not install yet!

2. Go to Control Panel\Programs and UNinstall your current Synaptics/Alps drivers

3. Reboot

4. Doubleclick the T450 driver you just downloaded, run it, but UNtick the option to install now.
--- It will unpack to C:\DRIVERS\Win\UNAV

5. Go to C:\DRIVERS\Win\UNAV\WinWDF\X64\SynPD.inf for 64-bit (or X86\SynPD.inf for 32-bit)

6. Edit SynPD.inf and
--- find and delete all lines with LEN0036 in it
--- find all lines with LEN200E and change LEN200E into LEN0036
--- save the file

LEN0036 is the T440 hardware ID for both clunkpad and touchpad+buttons.
LEN200E is the T450 hardware ID for the touchpad+buttons.

7. Go to C:\DRIVERS\Win\UNAV and doubleclick on Setup.exe
--- when Windows complains about unsigned stuff, click on "install anyway".

8. Reboot and enjoy!


See similar instructions to replace the Clunkpad driver on the X240/s

RealBlackStuff
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Re: T440/p CLUNKPAD: Pics and installation of T450 Synaptics and Alps Touchpad+buttons

#3 Post by RealBlackStuff » Sat Sep 01, 2018 3:03 pm

How to install an ALPS touchpad+buttons driver in a T440/T440p:

1. Download this (Lenovo Yoga 14) ALPS driver: https://download.lenovo.com/ibmdl/pub/p ... gh09ww.exe, do not install yet!

2. Go to Control Panel\Programs and UNinstall your current Synaptics/Alps drivers

3. Reboot

4. Doubleclick the ALPS driver you just downloaded, run it, but UNtick the option to install now.
--- It will unpack to C:\DRIVERS\Win\ALPSUNAV

5. Go to C:\DRIVERS\Win\ALPSUNAV\Vi64\Apfiltr.inf for 64-bit (or Vi32\Apfiltr.inf for 32-bit)

6. Edit Apfiltr.inf
--- there are NO lines with LEN0036 in it, so we use another (not needed) LENxxxx one
--- instead, find all lines with LEN002D and change LEN002D into LEN0036
--- save the file

LEN0036 is the T440 hardware ID for the clunkpad.
LEN002D is an UNKNOWN TO ME hardware ID, but which is not needed here

7. Go to C:\DRIVERS\Win\ALPSUNAV and doubleclick on Setup.exe
--- when Windows complains about unsigned stuff, click on "install anyway".

8. Reboot

AlexGonzo
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Location: San Marcos, TX (Texas State U)

Re: T440/p CLUNKPAD: Pics and installation of T450 Synaptics and Alps Touchpad+buttons

#4 Post by AlexGonzo » Wed Sep 26, 2018 2:15 pm

Just wanted to say thank you for this. I purchased a T440p over the weekend and a new trackpad but didn't know I purchased an Alps. Just one note to add: I was having difficulty installing the ALPS driver on windows. I kept running into installation failure so I turned digital signing off and that allowed me to install the drivers. Not sure if that helps anyone else, but it could save some people the headache of looking google for an answer.

Cheers,
Alex

Emulle
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Joined: Wed Sep 19, 2018 10:48 am
Location: Vikbolandet, Sweden

Re: T440/p CLUNKPAD: Pics and installation of T450 Synaptics and Alps Touchpad+buttons

#5 Post by Emulle » Sat Oct 13, 2018 2:30 pm

I would just like to share that I bought an Alps touchpad for my T440p, considering I could not find any Synaptics one in EU for a decent price <50£.
Under Linux(Arch Linux) it was a simple plug & play with libinput, everything works and there's no issue with two-finger scrolling nor palm rejection when writing/using the trackpoint.

All in all I'm satisfied! :D

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