Lenovo Yoga Slim 9 (Intel)

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		Partial
Wireless	`8086:a0f0`	Yes
TPM

Installation

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

gollark: This is quite relevant to anyone looking to buy this computer, which is possibly some people I don't know.

gollark: You can look here if you want to know more: https://en.wikipedia.org/wiki/Bulldozer_(microarchitecture)

gollark: Fascinating.

gollark: This is why AMD was basically irrelevant for many years until Zen back in 2017 or so.

gollark: Each pair of "cores" shares a bunch of resources, so it isn't really as fast as an actual "core" in other designs, and I think their IPC was quite bad too, so the moderately high clocks didn't do very much except burn power.