Lenovo Yoga 9i Touchpad Not Working After Sleep Windows 11: I2C Driver Fix

Lenovo Yoga 9i is a premium 2-in-1 convertible laptop with a precision touchpad that supports Windows 11 multi-touch gestures. A common issue on Yoga 9i units is the touchpad completely stopping after the laptop wakes from sleep — finger movement has no effect, tapping does not register, and gestures do not work. Connecting an external mouse works normally, confirming the issue is specific to the touchpad rather than the entire input system. I have fixed this on multiple Yoga 9i generations and this guide covers every reliable solution.

Why Lenovo Yoga 9i Touchpad Stops Working After Sleep on Windows 11

I2C HID Touchpad Driver Failing to Resume After Sleep

Lenovo Yoga 9i uses an I2C-connected precision touchpad rather than a USB-connected one. The I2C bus requires a specific resume sequence when the laptop wakes from sleep. If the I2C HID driver fails to complete this sequence within Windows 11 timing requirements, the touchpad device is not re-initialized and remains unresponsive until the next full reboot. This problem is more common after Windows 11 updates that change the I2C bus power management behavior, and it does not affect USB input devices like an external mouse because they use a different resume path.

Windows 11 Fast Startup Preventing Full Hardware Re-initialization

Windows 11 Fast Startup mode saves a partial hibernation state when the laptop is shut down, allowing faster boot times. However, this means the hardware resume from a Fast Startup boot is similar to a sleep resume rather than a cold boot. The I2C touchpad driver sometimes does not complete its initialization correctly in this partial resume scenario, leaving the touchpad non-functional after what appears to be a normal startup. Disabling Fast Startup forces a complete hardware initialization sequence on every boot, which reliably initializes the I2C touchpad.

Lenovo Yoga Touchpad Mode Switching in Tent or Tablet Mode

Lenovo Yoga 9i automatically disables the touchpad when rotated into tent or tablet mode to prevent accidental input. If the laptop is put to sleep while in tent or tablet mode and then woken while being rotated back to laptop mode, the system sometimes fails to re-enable the touchpad because the mode-switch sensor and the sleep resume event arrive simultaneously. The touchpad remains in its tent-mode disabled state despite the laptop being physically in laptop mode.

How to Fix Lenovo Yoga 9i Touchpad Not Working After Sleep Windows 11

Step 1 — Re-enable Touchpad in Device Manager

Open Device Manager and expand Human Interface Devices. Look for the HID-compliant touchpad or Synaptics HID Pointer Device entry. If it shows with a down-arrow icon, right-click and select Enable device. If it shows without an icon, right-click and select Disable device, wait five seconds, then right-click and select Enable device. This toggle forces the I2C driver to re-initialize the touchpad hardware and often restores function immediately without requiring a reboot. Test the touchpad after re-enabling before proceeding to more involved solutions.

Step 2 — Disable Fast Startup and Adjust I2C Power Settings

Go to Control Panel, Power Options, and click Choose what the power buttons do. Click Turn on fast startup and uncheck it. Click Save changes. Next, in Device Manager, expand System devices and find the Intel Serial IO I2C Host Controller. Right-click it and open Properties. Go to the Power Management tab and uncheck Allow the computer to turn off this device to save power. Repeat this for any additional I2C Host Controller entries listed. These changes ensure the I2C bus is fully powered through sleep cycles and that the laptop performs a complete hardware initialization on each boot rather than a partial resume.

Step 3 — Reinstall Touchpad Driver from Lenovo Vantage

Open Lenovo Vantage and go to Device Settings or My Device Settings. Find the Touchpad or Mouse driver entry in the Driver and Software section. Click Update or Reinstall. If Lenovo Vantage is not installed, go to Lenovo support page and search for Yoga 9i with your generation suffix. Download the touchpad driver from the Mouse and Keyboard category. Install it and reboot. After rebooting, put the laptop to sleep manually, wake it, and test the touchpad immediately to confirm the sleep-resume issue is resolved before considering the fix complete.

My Yoga 9i touchpad stopped working every time I opened the lid from sleep. Had to reboot each time. Disabling Fast Startup and disabling power management on the I2C controller completely fixed it. The touchpad now works every single time I wake from sleep. — Patricia N., Lenovo Community Forums

Frequently Asked Questions

Does Lenovo Yoga 9i touchpad support Windows 11 precision touchpad gestures?

Yes. Lenovo Yoga 9i includes a Microsoft Precision Touchpad that natively supports all Windows 11 multi-touch gestures including two-finger scroll, three-finger swipe for task view, four-finger swipe for virtual desktops, and pinch-to-zoom. These gestures are configured in Settings, Bluetooth and devices, Touchpad. The precision touchpad standard means no third-party driver is required for gesture support, only the standard Windows 11 HID touchpad driver.

Why does Lenovo Yoga 9i touchpad sensitivity change after a Windows 11 update?

Touchpad sensitivity changes after a Windows 11 update occur when the update modifies the default touchpad settings in the Precision Touchpad configuration. Go to Settings, Bluetooth and devices, Touchpad and check the Sensitivity slider. Reset it to your preferred level. Also check the tap sensitivity setting which controls how lightly you need to tap for a click to register. Lenovo Vantage may also include touchpad sensitivity settings that override Windows defaults.

How do I disable the Lenovo Yoga 9i touchpad when an external mouse is connected?

Go to Settings, Bluetooth and devices, Touchpad. Look for the option Leave touchpad on when a mouse is connected and turn it off. With this disabled, the touchpad automatically deactivates whenever a USB or Bluetooth mouse is connected, and reactivates when the mouse is disconnected. This is useful for preventing accidental touchpad input during gaming or typing with an external mouse.

Can Lenovo Yoga 9i touchpad be used in tablet mode?

In tablet mode the Yoga 9i automatically disables the touchpad to prevent accidental input when the keyboard is folded back. This is by design and is controlled by the rotation sensor and the mode-switching logic in Windows 11. The touchpad re-enables when the laptop is returned to laptop mode. If the touchpad does not re-enable after returning from tablet mode, the mode-switch driver has not completed its re-enable sequence — disabling and re-enabling the touchpad device in Device Manager restores it.

Conclusion

Lenovo Yoga 9i touchpad not working after sleep on Windows 11 is caused by the I2C HID driver not completing its resume sequence, Fast Startup preventing full hardware re-initialization, or the touchpad remaining in tent-mode disabled state after a sleep-wake cycle. Re-enable the touchpad in Device Manager for an immediate fix, disable Fast Startup and remove I2C controller power management to prevent future occurrences, and reinstall the touchpad driver from Lenovo Vantage if the issue persists after power management changes. Testing immediately after waking from sleep confirms whether the fix is complete.