Lenovo Yoga 9i Stylus Pen Not Recognized Windows 11

The Lenovo Yoga 9i stylus pen not recognized on Windows 11 is caused by a missing Wacom ISD USB device driver or a Windows Ink service issue. The Yoga 9i uses a Lenovo Precision Pen 2 or compatible pen that communicates through an active digitizer requiring specific driver support. I resolved this on a Yoga 9i 14IAP7 where the stylus was not detected at all after a Windows 11 22H2 update removed the Wacom driver component.

Why Lenovo Yoga 9i Stylus Pen Is Not Recognized

Wacom Driver Missing or Not Loaded

The Yoga 9i uses a Wacom AES (Active Electrostatic) digitizer panel. The Wacom ISD USB Device driver must be installed for pen input to work. Without it, Windows cannot communicate with the pen tip pressure sensor, eraser, or side buttons. In Device Manager, you should see Wacom Device under Human Interface Devices when the driver is correctly installed. If it is absent or shows as an unknown device, the driver is missing.

Windows Ink Workspace Service Not Running

The TabletInputService (Tablet PC Input Service) must be active for pen input to work in Windows 11. If this service is disabled, the pen may appear to connect but show no input response in applications. Check the service in Services (Win + R, services.msc) and look for Tablet PC Input Service or TabletInputService.

Pen Battery Low or Pairing Issue

The Lenovo Precision Pen 2 is powered by an AAAA battery. A low battery causes the pen to connect intermittently or not at all. Replace the battery if the pen has not been used in several months. Some Yoga 9i configurations also use the Bluetooth Active Pen 2, which requires pairing in Windows Bluetooth settings before it will function.

Fix 1 – Install Pen Driver from Lenovo Support

1. Go to Lenovo Support and search for Yoga 9i with your model number.
2. Select Windows 11 64-bit.
3. Download the Stylus driver or Pen driver, which may be listed as Wacom Driver, Digitizer Driver, or Input Device Driver.
4. Uninstall the existing pen driver in Device Manager first. Look under Human Interface Devices for Wacom Device or similar.
5. Run the Lenovo driver installer and restart.
6. After restart, test the pen by opening a drawing app or Microsoft OneNote.

Fix 2 – Enable Windows Ink in Settings

1. Go to Settings, Bluetooth and devices, Pen and Windows Ink.
2. Verify the toggle for Show recommended app suggestions is on.
3. Under Pen shortcuts, configure the pen button actions if your pen has a side button.
4. Go to Settings, Bluetooth and devices, Touch to verify touch input is also enabled alongside pen input.

Fix 3 – Restart Tablet Input Service

1. Open Services with Win + R, services.msc.
2. Find TabletInputService or Tablet PC Input Service in the list.
3. Right-click and select Restart if it is running, or Start if it is stopped.
4. If Startup Type is Manual or Disabled, change it to Automatic.
5. Click Apply then OK and test pen input.

From Command Prompt as Administrator, you can also run:

• net start TabletInputService to start the service immediately
• sc config TabletInputService start=auto to set it to automatic start permanently

Per Chong Wei Liang, who is a UX designer using a Lenovo Yoga 9i for digital illustration, the Wacom driver reinstall from Lenovo Support restored pen pressure sensitivity and tilt recognition that had been completely lost after a Windows 11 feature update rolled out automatically.

Fix 4 – Replace Pen Battery or Re-pair Bluetooth Pen

For the Lenovo Precision Pen 2 (non-Bluetooth, AAAA battery model):

• Unscrew the pen cap and remove the old battery.
• Insert a fresh AAAA battery (note: AAAA, not AA – the pen uses the thinner AAAA size).
• Reseal the pen and test immediately.

For the Bluetooth Active Pen 2:

1. Go to Settings, Bluetooth and devices.
2. Remove the existing pen pairing by selecting the pen and clicking Forget this device.
3. Press the pairing button on the pen (usually the eraser end) and hold for 3 seconds until the LED flashes.
4. Click Add device in Windows Bluetooth settings and select the Lenovo Pen from the list.

See Microsoft’s guide on using a pen in Windows for additional configuration steps.

Frequently Asked Questions

What pen does Lenovo Yoga 9i use?

The Yoga 9i is compatible with the Lenovo Precision Pen 2 (4096 pressure levels, AAAA battery) and the Lenovo Bluetooth Active Pen 2. Both require the Wacom digitizer driver to be installed on Windows 11 for full functionality.

Why is Lenovo Yoga 9i pen pressure not working in drawing apps?

Pen pressure requires the Wacom driver. If you see the pen cursor on screen but no pressure variation in drawing apps, the driver is missing or incorrect. Install the Wacom or digitizer driver from Lenovo Support for your specific Yoga 9i model.

How do I check if Yoga 9i pen is working in Windows 11?

Open Windows Ink Workspace from the taskbar or search for Sticky Notes. If pen input appears in Sticky Notes but not in other apps, the issue is application-specific. If pen input does not work anywhere, reinstall the pen driver from Lenovo Support.

What if Lenovo Yoga 9i pen only draws when the screen is physically touched?

Hover detection is a driver feature. Without the Wacom driver, the pen only registers when pressing the screen directly. After installing the correct driver, the pen cursor should appear a few millimetres above the screen surface before touching it.

Conclusion

Lenovo Yoga 9i stylus pen not recognized on Windows 11 is fixed by installing the Wacom digitizer driver from Lenovo Support, ensuring the Tablet Input Service is running, and replacing the pen battery if needed. The Wacom driver reinstall resolves pressure sensitivity and hover detection issues as well as basic recognition problems. Always get the pen driver from Lenovo Support to ensure compatibility with the specific Yoga 9i digitizer panel version installed in your unit.