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X250 what is the ACPI\LENxxxx number?

X230 and later series specific matters only
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X250 what is the ACPI\LENxxxx number?

#1 Post by RealBlackStuff » Sat Nov 04, 2017 4:27 pm

I'm putting an X250 touchpad with buttons in an X240.
For some reason, and despite all sorts of info on the web, on this machine I can't get the touchpad L and R buttons to work.
The middle button is fine and allows both vertical and horizontal scrolling.

I have seen a mod where a T450 touchpad with buttons went into a T440p.
They used this T450 driver: jbg206ww.exe for Windows 10.

This was the mod:
1. uninstall any Synaptics driver.

2. download the tool from the following website that can prevent the driver update from windows update.

3. Download the latest T450 driver from lenovo web site [jbg206ww.exe]

Setup the latest T450 driver on T440P:

1. Run jbg206ww.exe and only extract files without installation.
2. Edit x64/SynPD.inf under the folder to which the driver is extracted.
3. you will find three line as follows.
Be aware that “LEN0036” is the T440P Hardware ID.
please check your hardware ID from device manager in control pannel.
%SMB.IBMDeviceDesc% = LENOVO_GROUP36_InterTouch_Inst,ACPI\LEN0036

%SMB.IBMDeviceDesc% = LENOVO_GROUP36_InterTouch_Win8_Inst,ACPI\LEN0036

%SMB.IBMDeviceDesc% = LENOVO_GROUP36_InterTouch_Win8_Inst,ACPI\LEN0036


4. delete the three line.

5. find the three line below.
%SMB.IBMDeviceDesc% = LENOVO_GROUP41_InterTouch_Inst,ACPI\LEN200E

%SMB.IBMDeviceDesc% = LENOVO_GROUP41_InterTouch_Win8_Inst,ACPI\LEN200E

%SMB.IBMDeviceDesc% = LENOVO_GROUP41_InterTouch_Win8_Inst,ACPI\LEN200E

6. replace “LEN200E” into “LEN0036” for the three line
LEN200E is T450 hardware ID.

7. save the change and close the SynPD.inf file

8.Restart by command in cmd: shutdown /r /o /f /t 0 (other method: Hold shift down and click restart)

On the boot manu
Select Troubleshoot > Advanced Options > Startup Settings > Restart

In restart, select option 7. (you must select 7 to bypass digital signature ,otherwise the driver installation will be failed. )

9. Go to the folder to which the driver is extracted.

Run setup.exe normally.
During the installation, the warming message will pop-up that metioned without digital signature.
please agree it to complete the installation.

now the latest T450 driver will be installed ,but the driver did not have digital signature just because SynPD.inf was modified…….who cares….
Points 3-6 interest me.
The X240 ID = LEN0035
Not sure about X250, I think it is: LEN0046.

It should be visible when you go into Device Manager/Mice and other ... , in there rightclick on the second (synaptics) entry, click on Properties/Details/Device description, which needs to be changed to Hardware Ids.
It's the last entry there, LENxxxx

Can anybody with an X250 confirm LEN0046, or correct me, please?

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Re: X250 what is the ACPI\LENxxxx number?

#2 Post by JohnD. » Sat Nov 04, 2017 10:19 pm


I have a x250 running Windows 10 and I have just checked it.

The last entry is: *LEN0046

Listed below is what is listed under Property - Hardware Ids for Synaptics Pointing Device.


I hope this helps,
701c (2), 380X, 760EL, 600, 600x, 240, T30 (6), T42, T43 (2), T60 (2), T61p (2), T601 (TuuS Built), X61s, X61T, X301, X200T, X200s (2), x201s, X220 (4), X220T, X230 (2), X240 (2), X250, X130e (i3), T400, T410s, T410i, T420, T420s, T440p (2), T440s, T450s, T530 (i7), W520/530/540/541, P50,X1(2&3)

Posts: 19365
Joined: Mon Sep 18, 2006 5:17 am
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Re: X250 what is the ACPI\LENxxxx number?

#3 Post by RealBlackStuff » Sun Nov 05, 2017 6:19 am

Thanks John!

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