Input Lag and Touchpad Issues with Unity (New Input System) — ZenBook Duo 2025 UX8406CA

[Danil1]

Subject: Input Lag and Touchpad Issues with Unity (New Input System) — ZenBook Duo 2025 UX8406CA

Body:

Hi ASUS Team,

I’m experiencing a persistent input issue with my ZenBook Duo 2025 (UX8406CA) specifically when using Unity Editor with the New Input System enabled.

🟡 Issue Summary:

• When Unity Editor is open (no compiling or runtime), the touchpad input lags, sometimes freezes for several seconds.

• Right-click stops working entirely.

• Occasionally, the touchscreen and keyboard become unresponsive or behave erratically.

• This only occurs in Unity — other heavy apps like Rider, Chrome, and Visual Studio do not trigger the problem.

• Happens only when the keyboard is docked. Wireless use is stable.

:white_heavy_check_mark: Troubleshooting I've Done:

• Installed latest ASUS BLE Precision Touchpad Driver (v26.0.0.4)

• Reinstalled ASUS System Control Interface v3 and ScreenXpert

• Disabled Fast Startup and all power-saving options (HID, Bluetooth, I2C)

• Performed a full EC reset

• Tested with external mouse and keyboard – same issue.

This looks like a firmware or driver-level conflict with Unity's New Input System and the docked touchpad/keyboard mode.

:open_mailbox_with_lowered_flag: I also submitted a support case (E25040010542-0002 → N2504007359-0002), but it's been over two weeks without a reply. I'm hoping to get more visibility here.

Please let me know if there are any driver updates in progress or workarounds I could try. Thanks in advance!

[Falcon_ASUS]

@Danil1 
Unfortunately, the case number you provided might be incorrect as I cannot find any record of your contact with customer service. Could you please let me know which region's customer service you previously contacted?

Since the issue you reported involves the use of third-party software, we are unable to provide technical support for third-party applications. We recommend that you provide feedback to the third-party software vendor to confirm if any additional configuration is needed. We apologize for any inconvenience caused.

[Danil1]

Thanks for the reply. Just to clarify:

This issue is not caused by Unity itself but by a conflict between the **ASUS touchpad/keyboard firmware or drivers** and how Unity accesses input (via the Windows input system). Other laptops do not experience this issue. I’ve already ruled out Unity bugs.

I also have a confirmed ASUS support case: [E25040010542-0002 → N2504007359-0002]. The issue was acknowledged and forwarded to the USA support team. Please double-check using my case number or email address used to register it (nanaschi1984@gmail.com).

I am asking ASUS to investigate the **BLE Precision Touchpad behavior when docked**, possibly a firmware issue when under specific I2C or HID load.

Thanks for your attention.

In the attachment you'll see the open issue without response that hangs for weeks. I guess if you can't find it then I'll not get a reply there any time soon. 

[Falcon_ASUS]

@Danil1 
In order to avoid misunderstandings, please provide us with the download link for the Unity you have installed, as well as a video of the issue occurring, the BIOS version, the system version, and the OS build version currently being used on your laptop. Additionally, I have sent you a message, please check it. Thank you.

[Danil1]

Hello,

Thank you for your reply.

:heavy_check_mark: Unity tested versions (download link): https://unity.com/releases/editor/whats-new/2022.3.22f1
https://unity.com/releases/editor/whats-new/6000.0.30 
(It might be any unity version with input system)
:heavy_check_mark: BIOS version: 308
:heavy_check_mark: System version: Windows 11 Pro
:heavy_check_mark: OS build: 26100.1
:heavy_check_mark: Video of the issue: https://drive.google.com/file/d/1oUXFTSRn4kEtGZ7nrGbKzxU0MU1ie7xF/view?usp=sharing

Let me know if you need any other details.

Best regards,
Danil