### System details

Lenovo ThinkPad X1 Carbon Gen 14 - 21V7CTO1WW

### What's wrong?

## Summary

On Lenovo ThinkPad X1 Carbon Gen 14 (Panther Lake, IPU7-PTL with OmniVision OV08X40 sensor) running Omarchy, the integrated camera is invisible to Linux. ACPI `_STA` returns 0 for all camera-related devices, so the sensor never binds, the media graph has no sensor entity, and `/dev/video50` only produces black NV12 frames.

The Gen 13 (Lunar Lake / IPU7-LNL) on the same Omarchy installation works correctly. Suggesting Omarchy's Panther Lake camera path (`install/config/hardware/intel/ptl-kernel.sh` and friends) is only validated for Dell XPS today and doesn't ship what Lenovo PTL needs.

## Hardware / system

- Machine: Lenovo ThinkPad X1 Carbon Gen 14 (`21V7CTO1WW`)
- CPU: Intel Core Ultra X7 368H (Panther Lake)
- IPU: IPU7-PTL (`PCI 8086:b05d`), config dir `/etc/camera/ipu75xa/`
- Sensor: OmniVision OV08X40 (ACPI `OVTI08F4`)
- BIOS: `N4OET47W 1.10` (2026-03-30) — latest available per Omarchy firmware update
- Omarchy: 3.8.2
- Kernel: tested on both `linux 7.0.9-arch2-1` (mainline) and `linux-ptl 7.0.9-arch1-1-ptl` — same symptoms
- `intel-ipu7-camera 1.0.3-4` installed (Omarchy's IPU7 install path triggered correctly)

## Symptoms

```
$ cat /sys/bus/acpi/devices/OVTI08F4:00/status
0

$ for d in /sys/bus/acpi/devices/{OVTI*,INT3472:*}; do
    echo "$(basename $d) status=$(cat $d/status 2>/dev/null)"
  done
OVTI01AF:00 status=0
OVTI01AF:01 status=0
OVTI01AF:02 status=0
OVTI08F4:00 status=0
INT3472:00 status=15
INT3472:01 status=15
INT3472:02 status=0
INT3472:03 status=0
... (all :02-:0b status=0)

$ ls /sys/bus/i2c/drivers/ov08x40/
bind  module  uevent  unbind    # no device bound

$ media-ctl -d /dev/media0 -p | grep -i ov08x40
                                    # no match — sensor not in graph
```

`[email protected]` runs but the GStreamer pipeline fails:

```
v4l2-relayd: g_param_spec_enum: assertion 'g_enum_get_value (enum_class, default_value) != NULL' failed
v4l2-relayd: gst_element_set_state: assertion 'GST_IS_ELEMENT (element)' failed

# Triggered by icamerasrc:
CamHAL[INF] CameraParserInvoker: getAvailableSensors, Found IPU: IPU7
CamHAL[WAR] CameraParserInvoker: parseSensors: No sensors available
```

`/dev/video50` is readable but only delivers solid-black NV12 frames (Y=16, UV=128).

## What I've tried

- BIOS `Security → I/O Port Access → Integrated Camera` is `Enabled`. No nightlight/privacy option blocks it. Physical camera shutter is open.
- Switched from mainline `linux` to `linux-ptl` — identical symptoms.
- Ran the post-suspend reset sequence from Omarchy's `camera-sleep-hook` (`rmmod ov08x40 intel_ipu7_isys; modprobe ...; systemctl restart v4l2-relayd@ipu7`) — no change.
- Reboot — no change.
- Omarchy's `install/config/hardware/intel/ipu7-camera.sh` does match `OVTI08F4` and installs `intel-ipu7-camera`, but that package alone is not sufficient on Panther Lake.

## Root cause hypothesis

Panther Lake IPU7 cameras need an `intel_cvs` (Camera Vision Sensor) driver from [`intel/vision-drivers`](https://github.com/intel/vision-drivers) to satisfy the ACPI dependency chain for `OVTI08F4` and the corresponding `INT3472` power controllers. Mainline kernel ships an `intel_cvs` module, but it does **not** bind these Panther Lake ACPI nodes — the upstream driver is incomplete for PTL.

References:
- [intel/vision-drivers#36 — intel_cvs: Critical for IPU7 camera on Panther Lake — should be upstreamed to mainline](https://github.com/intel/vision-drivers/issues/36)
- [CachyOS/linux-cachyos#804 — Guide: Getting Intel IPU7 camera working on Panther Lake (Dell XPS)](https://github.com/CachyOS/linux-cachyos/issues/804) — confirms `intel_cvs.ko` from `intel/vision-drivers` is the critical blocker for Panther Lake camera, plus a modprobe softdep order to load `usbio` / `gpio_usbio` / `i2c_usbio` / `intel_cvs` / `intel_skl_int3472_discrete` before `intel_ipu7`.

## Suggested fix

1. Confirm whether the Dell XPS PTL camera path actually works today on `linux-ptl` alone, or whether it also depends on something not shipped (the hardware overlap with this Lenovo case is high — same IPU, same `OVTI08F4` HID).
2. If `intel_cvs` is the missing piece, ship it as a DKMS package and extend the install path beyond just `omarchy-hw-match "XPS"` (e.g. trigger on `OVTI08F4` HID + Panther Lake + status=0, or add explicit Lenovo Gen 14 detection).
3. Add the modprobe softdep order from the CachyOS guide.

Happy to test patches on this hardware and help out to make sure Omarchy works on this laptop!