# Lenovo Yoga Slim 9 (intel)

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Hardware | PCI/USB ID | Working?
--- | --- | ---
Touchpad |  | Yes
Keyboard |  | No
Video | `8086:9a49` | Yes
Touchscreen | `HID 5235` | Yes
Webcam | `04f2:b6df` | Yes
Bluetooth | `8087:0026` | Partial
Audio | `8086:a0c8` | Partial
Wireless | `8086:a0f0` | Yes
TPM |  | Untested

## Installation

In order to install, secure boot must be disabled in the BIOS. You can enter it by pressing `F2` (or `Fn+F2`) during bootup. In order to access the boot-menu allowing you to choose a non standard boot device (like USB devices), press `F12` (or `Fn+F12`) during bootup.

Initially, both keyboard and touchpad are unusable, see individual Keyboard and Touchpad sections below.

## Keyboard

The keyboard does not work in neither Xorg nor Wayland, only in the TTY. In order to get it working, add `i8042.dumbkbd` to the kernel parameters. Note that the Caps Lock LED stops turning on after this.

## Touchpad

The touchpad is barely usable, only with the "right" pressure. https://gitlab.freedesktop.org/libinput/libinput/-/issues/604.

Luckily, the fix is easy. As mentioned in the bug report, just create file `/etc/libinput/local-overrides.quirks` with the following content:

    [Lenovo Yoga Slim 9 Pressurepad]
    MatchBus=i2c
    MatchVendor=0x27C6
    MatchProduct=0x01E8
    AttrEventCodeDisable=ABS_MT_PRESSURE;ABS_PRESSURE;

After that, log out and log in again and the touchpad should work.

## Firmware

While Lenovo is known to support fwupd in general, the Yoga Slim 9 has not been added yet.

### Firmware data path

The BIOS comes with a "self healing" backup BIOS, stored in `EFI/Lenovo/BIOS/SelfHealing.fd`. The file is about 16M in size and is written each time you make changes to the BIOS (manual modification or BIOS update).

## Bluetooth

Bluetooth mostly works out of the box. Sometimes it is necessary to restart the service (particularly after suspending). Restart `bluetooth.service` to fix it.

## Audio

The laptop comes with an Realtek ALC287 audio chipset, that is unfortunately known to have bad support in Linux, see https://bugzilla.kernel.org/show_bug.cgi?id=208555. While microphone, the audio jack (ie headphones) and bluetooth work, it has not been possible so far to play audio using the laptop speakers.

## Wireless

The laptop comes with an Intel Corporation Wi-Fi 6 AX201 (802.11 ax) wireless controller, working out of the box.

## Battery Conservation Mode

Lenovo offers a "Battery Conservation Mode". When the conservation mode is enabled, your battery will only be charged to 60% to maximize its lifespan. You can use ideapad-cmAUR to control the conservation mode.

## See also

- Official Hardware Maintainance Manual (HMM): https://download.lenovo.com/consumer/mobiles_pub/yoga_slim_9i_hmm.pdf
- Official Hardware Specs: https://psref.lenovo.com/syspool/Sys/PDF/Yoga/Yoga_Slim_9_14ITL5/Yoga_Slim_9_14ITL5_Spec.pdf

Category:

- Lenovo