Jump to content

# Lenovo Yoga 7 2-in-1 14AHP9

From ArchWiki

Hardware | PCI/USB ID | Working?
--- | --- | ---
Touchscreen |  | Yes
Touchpad |  | Yes
GPU | `1002:1900` | Yes
Webcam | `5986:2169` | Yes
Bluetooth | `0bda:5852` | Yes
SD-card reader | `17a0:9750` | Yes
Audio | `1022:15e3` | Yes
Wi-Fi | `10ec:c852` | Yes
Fingerprint reader | `1c7a:0583` | Partial
Tablet mode switch |  | Yes
TPM (Pluton) |  | Untested

This laptop tablet is not to be confused with Lenovo Yoga Pro 7 14AHP9.

## Accessibility

Before an operating system loads, the device provides several options for navigation.

- In the firmware interface, use `Left/Right` arrows to switch between side menu and main view, `Up/Down` arrows to navigate within main menu, `F5/F6` to change values, `Enter` to select an option, and `Esc` to display exit menu.
- Alternatively, use the touchscreen−it is always on while in the firmware interface. An on-screen keyboard is available when entering administrator password.
- Press `F2` to enter the firmware interface, and `F12` to enter the boot menu.
- The Flip To Start option may be enabled in the firmware interface in order to initiate boot by opening the lid.
- While shutdown, connecting AC or pressing any button on the keyboard will display current battery charge.

Note The firmware interface does not feature sound or haptic feedback.
Tip A visual simulation of the very similar interface is available at Lenovo.

## Firmware

fwupd does not support this device yet, but is able to update platform's UEFI CA certificates. With great caution, a firmware update can be performed for this device, as described in Flashing BIOS from Linux#Lenovo.

Secure Boot works with custom keys if Microsoft Corporation UEFI CA is also enrolled (e.g., using sbctl).

The device supports "BIOS self-healing", and stores a firmware backup image on EFI system partition; its size is about 6 MB. This image should not be signed when setting up Secure Boot.

## Function keys

Key | Visible?1 | Marked?2 | Effect
--- | --- | --- | ---
`Fn+Esc` | No | Yes | Toggles Fn lock
`Fn+F1` | Yes | Yes | `XF86AudioMute`
`Fn+F2` | Yes | Yes | `XF86AudioLowerVolume`
`Fn+F3` | Yes | Yes | `XF86AudioRaiseVolume`
`Fn+F4` | Yes | Yes | `XF86AudioMicMute`
`Fn+F5` | Yes | Yes | `XF86MonBrightnessDown`
`Fn+F6` | Yes | Yes | `XF86MonBrightnessUp`
`Fn+F7` | Yes | Yes | `Super+p`
`Fn+F8` | Yes | Yes | `XF86RFKill`
`Fn+F9` | Yes | Yes | `Super+i`
`Fn+F10` | Yes | Yes | `Super+l`
`Fn+F11` | Yes | Yes | `Ctrl+Alt+Tab`
`Fn+F12` | Yes | Yes | `XF86Calculator`
`Fn+Ins` | Yes | Yes | `XF86Favorites`
`Fn+PrintScreen/t/s` | Yes | Yes | `PrintScreen`
`Fn+Del` | Yes | Yes | `Del`
`Fn+i` | Yes | Yes | `Ins`
`Fn+p` | Yes | Yes | `Pause`
`Fn+k` | Yes | Yes | `Scroll_Lock`
`Fn+b` | Yes | Yes | `Break`
`Fn+n` | Yes | Yes | `XF86RootMenu`
`Fn+m` | Yes | Yes | `XF86TouchpadToggle`
`Fn+Space` | Yes | Yes | `NoSymbol` 3
`Fn+Copilot` | No | Yes | See note 4
`Fn+Up` | Yes | Yes | `PageUp` (Next)
`Fn+Down` | Yes | Yes | `PageDown` (Prior)
`Fn+Left` | Yes | Yes | `Home`
`Fn+Right` | Yes | Yes | `End`

1. The key is visible to `xev` and similar tools.
2. The physical key has a symbol on it, which describes its function.
3. This firmware-managed key cycles between keyboard backlight modes.
4. To remap this key, follow the steps described in Keyboard input#Identifying scancodes and Map scancodes to keycodes#Using setkeycodes.

## Power management

Enabling battery conservation mode as described in Lenovo#Battery conservation mode will limit the maximum charge to 80%. TLP also supports this method using options described on the vendors page.

## Disabling redundant WMI drivers

Some kernel modules targeted at Lenovo devices are not used by this ultrabook, such as `lenovo-wmi-hotkey-utilities` and `lenovo_wmi_gamezone`. If these modules fail to load during boot, you can safely blacklist them.

## Fingerprint reader

The supplied fingerprint reader enforces the Secure Device Connection Protocol, and refuses to store fingerprints if the protocol is not followed. Currently, SDCP is not supported by Fprint, but enrolling and storing fingerprints is possible using the custom script.

You will need to install python, python-docopt, python-pyusb, and python-cryptography. Installing Fprint is not required for this operation.

Save the script as `egismoc-sdcp-1c7a-0583.py` and comment out lines 500-502 (inclusive):

    ./egismoc-sdcp-1c7a-0583.py

    reconnect_response_raw = egismoc_sdcp_reconnect()
    print(f"egismoc SDCP ReconnectResponse: {reconnect_response_raw.tobytes().hex(' ')}")
    verify_sdcp_reconnect_response(keys, reconnect_response_raw)

Make the following additional changes to lines 48 and 58, respectively:

    ./egismoc-sdcp-1c7a-0583.py

    dev = usb.core.find(idVendor=0x1c7a, idProduct=0x0583)
    ...
    NUM_ENROLL_STAGES = 20

After making these changes, it should be possible to enroll fingerprints.

    # python ./egismoc-sdcp-1c7a-0583.py enroll
    # python ./egismoc-sdcp-1c7a-0583.py verify

## See also

- Hardware probes
  - General (Linux Hardware)
  - Decoded acpi tables (Linux Hardware)
  - Simple tests (Linux Hardware)
- Specifications (Lenovo)
- Product home (Lenovo)

Category:

- Lenovo

Lenovo Yoga 7 2-in-1 14AHP9
Add topic