Huawei MateBook 14s

Note
This page refers to the Huawei MateBook 14s i7 16GB/1TB with Thunderbolt 4.
Hardware
PCI/USB ID
Working?
Touchpad
27C6:01E0
Yes
Touchscreen
27C6:0114
Yes
Keyboard
PS/2
Yes
Webcam
3408:c200
Yes
Bluetooth
8087:0026
Yes
Audio
8086:a0c8
Partial
Wi-Fi
8086:a0f0
Yes
Fingerprint reader
27c6:5125
No
Installation
Secure Boot
must be disabled in the BIOS to boot an Arch Linux install medium. Other than that, the installation can proceed
normally
.
Accessibility
The BIOS is text-based, OCR-friendly, and usable with the keyboard only.
Firmware
fwupd
detects the SSD, serial bus controller, USB camera, USB4 host controller, system firmware, and UEFI device firmware.
Function keys
To make function keys trigger
F1
–
F12
by default and special functions with
Fn
, write 1 to
/sys/devices/platform/huawei-wmi/fn_lock_state
. This setting survives reboots, so writing once suffices.
Key
Visible?
1
Marked?
2
Effect
Fn+F1
Yes
Yes
XF86MonBrightnessDown
Fn+F2
Yes
Yes
XF86MonBrightnessUp
Fn+F3
Yes
3
Yes
Cycle keyboard backlight (no/low/high)
Fn+F4
Yes
Yes
XF86AudioMute
Fn+F5
Yes
Yes
XF86AudioLowerVolume
Fn+F6
Yes
Yes
XF86AudioRaiseVolume
Dictation key (above 7)
Yes
3
Yes
Does nothing by default
Fn+F7
Yes
Yes
XF86AudioMicMute
Fn+F8
No
Yes
Super+p
Fn+F9
Yes
3
Yes
Toggles Wi-Fi via rfkill
Fn+F10
Yes
Yes
XF86Tools
Fn+F11
Yes
Yes
PrintScreen
Fn+F12
Yes
Yes
Ins
Fn+r
Yes
3
No
Nothing; supposed to toggle display refresh rate between 60 and 90Hz
Fn+p
Yes
3
No
Nothing; supposed to toggle performance mode
Fn+Left
Yes
No
Home
Fn+Right
Yes
No
End
Fn+Up
Yes
No
PageUp
Fn+Down
Yes
No
PageDown
The key is visible to
xev
and similar tools
The physical key has a symbol on it, which describes its function
Not visible to
xev
by default, but detected by the kernel (
Unknown key pressed
) and can be handled as described in
map scancodes to keycodes
.
Audio
Sound Open Firmware
is required. The speakers and microphones work well but not perfectly out of the box; the audio jack has some issues which are being addressed
[1]
.
Until the issue is fixed upstream, some workarounds can make the device usable.
Headphones
To use headphones plugged in the audio jack, until the fixes are incorporated upstream, you can use this workaround
[2]
(which uses
hda-verb
from
alsa-tools
):
Enable speaker and disable headphones
First, move the output to the speaker DAC:
# hda-verb /dev/snd/hwC0D0 0x16 0x701 0x0001
Then, enable the speaker:
# hda-verb /dev/snd/hwC0D0 0x17 0x70C 0x0002
Finally, disable the headphones:
# hda-verb /dev/snd/hwC0D0 0x1 0x715 0x2
Disable a speaker and enable headphones
First, move the output to the headphones DAC:
# hda-verb /dev/snd/hwC0D0 0x16 0x701 0x0000
Then, disable the speaker:
# hda-verb /dev/snd/hwC0D0 0x17 0x70C 0x0000
Afterwards, pin the output mode:
# hda-verb /dev/snd/hwC0D0 0x1 0x717 0x2
Then, enable the pin:
# hda-verb /dev/snd/hwC0D0 0x1 0x716 0x2
Finally, clear the pin value:
# hda-verb /dev/snd/hwC0D0 0x1 0x715 0x0
In both cases, if using ALSA ensure the outputs are unmuted using
alsamixer
or
amixer
; if using PulseAudio, ensure the correct output (speaker/headphone) is selected using
pactl set-sink-port
or
pavucontrol
.
ALSA
With plain
ALSA
you will have issues with simultaneous audio output from multiple sources that can be fixed with the following:
/etc/modprobe.d/audio.conf
options snd-intel-dspcfg dsp_driver=3
which unfortunately renders the microphones unusable.
PulseAudio
If using
PulseAudio
, both simultaneous audio output
and
the microphones will kind of work (only the two left microphones). However, to have audio output through the speakers you should run the
hda-verb
script from
#Enable speaker and disable headphones
after launching PulseAudio.
Battery protection
The
huawei_wmi
driver is available in the mainline kernel.
You can set the thresholds by writing directly to the file:
# echo '40 70' > /sys/devices/platform/huawei-wmi/charge_control_thresholds
or you can use tools such as
TLP
:
/etc/tlp.conf
START_CHARGE_THRESH_BAT0=40
STOP_CHARGE_THRESH_BAT0=70
Note
The battery is
BAT1
in sysfs, but
BAT0
in
tlp.conf
.
Display
The native resolution (2520x1680) is fully recognized and the refresh rate is set to 90Hz but it can be changed to 60Hz and 48Hz. Decreasing the refresh rate means less screen fluidity but also longer battery life