Lenovo ThinkPad T14 (AMD) Gen 3

This article covers the installation and configuration of Arch Linux on a Lenovo Thinkpad T14 (AMD) Gen 3 21CFCT01WW laptop. Everything seems to work pretty much out the box with linux≥5.19.0, except the keyboard does not feel the same as the first generation and the battery life is not great.

For a general overview of laptop-related articles and recommendations, see Laptop.

Firmware

Sleep to idle (s2idle, S0ix)

According to Lenovo staff the CPU generation in this device only supports s2idle and not S3 sleep.

See Power management/Suspend and hibernate#Changing suspend method.

Suspend/Hibernate

There is a known bug in the ath11k kernel module that could block the resume process, freeze the graphics interface and cause loss of wireless card interface. A manual fix is to disable the ath11k_pci module before hibernate and re-enable it after resume.

This also seems to fix an intermittent issue causing the laptop to immediately wake up after suspend.

See Dell XPS 13 (9310)#Wi-Fi for a systemd service to automate this procedure.

This can be automated via sleep hooks - if the module is unloaded before hibernating or suspending it unloads immediately with no delay, and the resume kernel bug does not happen:

/etc/systemd/system/ath11k-suspend.service

[Unit]
Description=Suspend: rmmod ath11k_pci
Before=sleep.target

[Service]
Type=oneshot
ExecStart=/usr/bin/rmmod ath11k_pci

[Install]
WantedBy=sleep.target

/etc/systemd/system/ath11k-resume.service

[Unit]
Description=Resume: modprobe ath11k_pci
After=suspend.target suspend-then-hibernate.target hibernate.target hybrid-sleep.target

[Service]
Type=oneshot
ExecStart=/usr/bin/modprobe ath11k_pci

[Install]
WantedBy=suspend.target suspend-then-hibernate.target hibernate.target hybrid-sleep.target

You need to enable ath11k-suspend.service and ath11k-resume.service.

Disable wakeup from sleep on touchpad activity

Use the following to disable wake-up events caused by the touchpad. Note that this only applies to the touchpad itself and the integrated buttons for left/right click at its bottom, not the 3 buttons at its top or any other input.

/etc/udev/rules.d/99-disable-touchpad-wakeup.rules

KERNEL=="i2c-ELAN0678:00", SUBSYSTEM=="i2c", ATTR{power/wakeup}="disabled"

Quectel EM05-G 4G LTE Modem

The integrated modem is supported by default, but you need a custom FCC unlock script for ModemManager. This script should be located at /usr/share/ModemManager/fcc-unlock.available.d/2c7c and has to be linked from /etc/ModemManager/fcc-unlock.d/2c7c:030a

/usr/share/ModemManager/fcc-unlock.available.d/2c7c

 #!/bin/bash

# SPDX-License-Identifier: CC0-1.0
# 2022 Leah Oswald <[email protected]>
#
# Queltec EM05-G FCC unlock mechanism
#

# require program name and at least 2 arguments
[ $# -lt 2 ] && exit 1

# first argument is DBus path, not needed here
shift

# second and next arguments are control port names
for PORT in "$@"; do
  # match port name
  echo "$PORT" | grep -q cdc-wdm && {
    CDC_WDM_PORT=$PORT
    break
  }
done

# fail if no cdc-wdm port exposed
[ -n "$CDC_WDM_PORT" ] || exit 2

# run mbimcli operation
mbimcli --device-open-proxy --device="/dev/$CDC_WDM_PORT" --quectel-set-radio-state=on
exit $?

Then link them:

# ln -s /usr/share/ModemManager/fcc-unlock.available.d/2c7c /etc/ModemManager/fcc-unlock.d/2c7c:030a

After that everything should work normal.

There is an issue at the ModemManager Gitlab to add this script to make this obsolete in the future.

Function keys

1. The key is visible to xev and similar tools
2. The physical key has a symbol on it, which describes its function

Mute Mic LED always on

There is an issue where the LED light on the mic button is always on.

Using alsamixer (from alsa-utils)

Select the Realtek ALCXXX sound card (with F6). The card label may be "HD-Audio Generic" (it should have 5 channels). Disable Auto-Mute Mode.

Use Fn+F4 to test the mute/unmute functionality for your microphone. The LED should now properly toggle on and off as expected. If it doesn’t work, try rebooting.

Keep the state of Auto-Mute Mode disabled, do not re-enable it.

Audio

Install sof-firmware.

See also

• Youtube install playlist
• An issue coming out of Hibernate
• Impossible to downgrade bios even when "Secure Rollback Prevention" is turned off