Microsoft Surface Laptop 3 Webcam + Touchscreen Fix

Fixes the front webcam and touchscreen on the Microsoft Surface Laptop 3 (and other Microsoft Surface devices using the same Intel IPU3 front-camera module OV9734 RGB + OV7251 IR) on Linux / Arch-based distros (Omarchy, EndeavourOS, Manjaro, etc.).

Install

git clone https://github.com/hansakoch/microsoft-surface-laptop3-webcam-fix.git
cd microsoft-surface-laptop3-webcam-fix
./install.sh
sudo reboot

After reboot, the webcam works in Chromium/Chrome/Brave and the touchscreen works. Test the webcam at https://webcamtests.com.

Compatible devices

Confirmed working:

• Microsoft Surface Laptop 3, 13.5" (model 1769) — Intel Core

The same hardware (OV9734 + OV7251 front camera on the Intel IPU3 pipeline) is used by other Microsoft Surface models, so this fix applies to them too:

• Microsoft Surface Laptop 3, 15" (model 1872) — Intel
• Microsoft Surface Laptop 4, 13.5" (Intel models)
• Any laptop whose front camera is OVTI9734 on IPU3 — check with: sudo dmesg | grep -i ovti9734 or ls /sys/bus/i2c/devices | grep -i ovti

The kernel patches are generic (they add OVTI9734 to the IPU3 bridge table and fix the ov9734 driver power-on), so they help every OV9734+IPU3 device, not just the Laptop 3.

Verify

cam --list                        # webcam: should list 1: 'ov9734'
dmesg | grep -E "OVTI9734|Connected 2 cameras"
ls /dev/ipts                      # touchscreen: device nodes present
pgrep -x iptsd                    # touchscreen: daemon running

What the installer does

1. Patches ipu-bridge to recognize the OVTI9734 sensor (so the camera graph connects) and ov9734 to power it up correctly (reset GPIO, MCLK, 50 ms settle, reset pulse per stream).
2. Builds libcamera 0.7.2 with an OV9734 sensor helper + IPU3 pipeline fixes, installed into /usr/local.
3. Builds the pipewire libcamera SPA plugin with two fixes so Chromium can enumerate and stream the camera (framerate in EnumFormat, and advertising the actually delivered sizes — the IPU3 delivers 1280x704, not 1280x720).
4. Enables the pipewire camera backend in Chromium, Chrome, and Brave (--enable-features=WebRtcPipeWireCamera in their flags configs).
5. Installs linux-surface + iptsd and makes linux-surface the default boot kernel — the Surface touchscreen (Intel Precise Touch) only works on the surface kernel. Camera patches are built for both kernels.

Touchscreen

The Surface Laptop 3 touchscreen uses Intel Precise Touch (IPTS) — raw touch data is processed in userspace by iptsd. This is not in the mainline kernel, so the installer installs the linux-surface kernel (which has the ipts driver), installs iptsd (auto-starts via udev), and sets linux-surface as the default boot entry. Nothing else to do — after the reboot it just works.

Screen recording with webcam

The camera is a libcamera/pipewire camera, not a V4L2 device — so tools that only speak V4L2 (like Omarchy's screen recorder) can't see it directly. The installer sets up a v4l2loopback bridge and a background service so it just works, automatically:

omarchy capture screenrecording-with-webcam   # pick "OV9734 Webcam"

The bridge starts itself when the recorder runs and stops when it's done, so Google Meet / Chromium still get the camera the rest of the time. The other two options in the picker (Intel IPU3 CIO2, ipu3-imgu) are internal hardware nodes — always pick OV9734 Webcam.

For non-Omarchy V4L2 apps there's also a manual bridge: webcam-loopback start / webcam-loopback stop.

Troubleshooting

• Black / dark image → turn on room lights; the sensor is fine.
• Blurry / soft image in Google Meet → Chromium's PipeWire camera path used to lock the OV9734 at 320×240. The installer builds a PipeWire plugin that prefers 1280×704 and hides modes below 960×540. After install (or a plugin update), restart PipeWire (systemctl --user restart pipewire wireplumber) and fully reload Meet. Confirm with pw-cli e <camera-node-id> Format (expect 1280×704). In Meet: Settings → Video → High definition.
• Fans spin / high CPU after install → an older ov9734-loopback-monitor used pgrep -f, which matches itself and (with Chromium's huge argv) can burn ~40% CPU forever. Update scripts/ov9734-loopback-monitor, reinstall or copy it to ~/.local/bin/, then systemctl --user restart ov9734-loopback.
• Browser still says no camera → close cam/qcam first (one consumer at a time), then check the browser's flags config has WebRtcPipeWireCamera (Chromium: ~/.config/chromium-flags.conf, Chrome: ~/.config/chrome-flags.conf, Brave: ~/.config/brave-origin-flags.conf). Fully restart the browser.
• Touchscreen not working → confirm you booted linux-surface (uname -r ends in -surface), and pgrep -x iptsd is running. If iptsd fails with The screen size is 0!, the kernel ipts touchscreen may still work in Hyprland — check hyprctl devices for ipts-…-touchscreen.
• IR camera (OV7251) not listed → kernel-probed but not a libcamera camera; not needed for normal webcam use.
• Screen recorder shows multiple cameras, webcam doesn't record → pick "OV9734 Webcam" (the others are raw IPU3 nodes). If the overlay is still black, check systemctl --user status ov9734-loopback and that the camera is free (close Meet first — one consumer at a time).

Notes

• Patches are for kernel 7.2.11-arch1-1, libcamera 0.7.2, pipewire 1.6.9. Small and apply to nearby versions.
• Kernel patches are GPL-2.0, libcamera/pipewire patches follow their upstream licenses.