Lenovo ThinkPad L14 (Gen 4)

Resources

The Lenovo ThinkPad L14 (Gen 4) is a 14-inch laptop manufactured by Lenovo for business needs. As such, it is thicker than many modern laptops and has plenty of ports. The laptop is also quite easy to maintain and has the option of installing an LTE modem.

Hardware

Standard

Device	Make/model	Status	Vendor ID / Product ID	Kernel driver(s)	Kernel version
CPU	AMD Ryzen 5 PRO 7530U with Radeon Graphics	Works	N/A	N/A	6.4.11
Wi-Fi	MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter	Works	N/A	mt7921e	6.4.11
Ethernet	Realtek Semiconductor Co., Ltd. RTL8111/8168/8411	Works	N/A	r8169	6.4.11
Bluetooth	Foxconn / Hon Hai Wireless_Device	Works	0489:e0d8	btusb	6.4.11
Audio	Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller	Works	N/A	snd_hda_intel	6.4.11
GPU	Advanced Micro Devices, Inc. [AMD/ATI] Barcelo (rev d5)	Works	N/A	amdgpu	6.4.11
MMC card reader	O2 Micro, Inc. SD/MMC Card Reader Controller (rev 01)	Works	N/A	N/A	6.4.11
Smart card reader	EMV Smartcard Reader	Works	N/A	usbfs	6.4.11
Finger Print	Cypress Semiconductor	Works	N/A	usbhid	6.4.11
RGB Camera	Integrated RGB Camera	Works	N/A	uvcvideo	6.4.11
Touchpad	ELAN067F:00	Works	N/A	i2c_designware	6.4.11
Trackpad	TPPS/2 Elan TrackPoint	Works	N/A	mousedev	6.4.11

Accessories

Note
Be aware of the WWAN BIOS whitelisting in all new ThinkPad models.

Device	Make/model	Status	Vendor ID / Product ID	Kernel driver(s)	Kernel version	Notes
LTE modem	Quectel Wireless Solutions Co., Ltd. EM05-G	Works	2c7c:030a	cdc_mbim	6.6.13

root #lspci -nn

00:00.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne Root Complex [1022:1630]
00:00.2 IOMMU [0806]: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne IOMMU [1022:1631]
00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Renoir PCIe Dummy Host Bridge [1022:1632]
00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Renoir PCIe Dummy Host Bridge [1022:1632]
00:02.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne PCIe GPP Bridge [1022:1634]
00:02.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne PCIe GPP Bridge [1022:1634]
00:02.4 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne PCIe GPP Bridge [1022:1634]
00:02.6 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne PCIe GPP Bridge [1022:1634]
00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Renoir PCIe Dummy Host Bridge [1022:1632]
00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Renoir Internal PCIe GPP Bridge to Bus [1022:1635]
00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 51)
00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Cezanne Data Fabric; Function 0 [1022:166a]
00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Cezanne Data Fabric; Function 1 [1022:166b]
00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Cezanne Data Fabric; Function 2 [1022:166c]
00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Cezanne Data Fabric; Function 3 [1022:166d]
00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Cezanne Data Fabric; Function 4 [1022:166e]
00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Cezanne Data Fabric; Function 5 [1022:166f]
00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Cezanne Data Fabric; Function 6 [1022:1670]
00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Cezanne Data Fabric; Function 7 [1022:1671]
01:00.0 Non-Volatile memory controller [0108]: Transcend Information, Inc. Device [1d79:2263] (rev 03)
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0e)
04:00.0 SD Host controller [0805]: O2 Micro, Inc. SD/MMC Card Reader Controller [1217:8621] (rev 01)
06:00.0 Network controller [0280]: MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter [14c3:0616]
07:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Barcelo [1002:15e7] (rev d5)
07:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Renoir Radeon High Definition Audio Controller [1002:1637]
07:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 10h-1fh) Platform Security Processor [1022:15df]
07:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne USB 3.1 [1022:1639]
07:00.4 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Renoir/Cezanne USB 3.1 [1022:1639]
07:00.5 Multimedia controller [0480]: Advanced Micro Devices, Inc. [AMD] ACP/ACP3X/ACP6x Audio Coprocessor [1022:15e2] (rev 01)
07:00.6 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller [1022:15e3]

root #lsusb

Bus 004 Device 004: ID 17ef:1020 Lenovo ThinkPad Dock Hub
Bus 004 Device 003: ID 17ef:3062 Lenovo ThinkPad Dock Ethernet [Realtek RTL8153B]
Bus 004 Device 002: ID 17ef:101f Lenovo 
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 011: ID 30c9:0050 Luxvisions Innotech Limited Integrated RGB Camera
Bus 003 Device 009: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader
Bus 003 Device 005: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 003 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 008: ID 1235:8200 Focusrite-Novation Scarlett 2i4 USB
Bus 003 Device 012: ID 17ef:3063 Lenovo ThinkPad Dock Audio
Bus 003 Device 010: ID 04d9:0125 Holtek Semiconductor, Inc. USB Keyboard
Bus 003 Device 007: ID 17ef:1021 Lenovo ThinkPad Dock Hub [Cypress HX2VL]
Bus 003 Device 006: ID 17ef:1026 Lenovo 
Bus 003 Device 004: ID 17ef:3060 Lenovo ThinkPad Dock
Bus 003 Device 002: ID 17ef:1025 Lenovo 
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 06cb:00f9 Synaptics, Inc. 
Bus 001 Device 002: ID 0489:e0d8 Foxconn / Hon Hai Wireless_Device
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

root #i2cdetect -l

i2c-0   i2c             Synopsys DesignWare I2C adapter         I2C adapter
i2c-1   i2c             Synopsys DesignWare I2C adapter         I2C adapter
i2c-2   i2c             AMDGPU DM i2c hw bus 0                  I2C adapter
i2c-3   i2c             AMDGPU DM i2c hw bus 1                  I2C adapter
i2c-4   i2c             AMDGPU DM i2c hw bus 2                  I2C adapter
i2c-5   i2c             AMDGPU DM i2c hw bus 3                  I2C adapter
i2c-6   i2c             AMDGPU DM aux hw bus 0                  I2C adapter
i2c-7   i2c             AMDGPU DM aux hw bus 2                  I2C adapter
i2c-8   i2c             AMDGPU DM aux hw bus 3                  I2C adapter
i2c-9   i2c             DPMST                                   I2C adapter
i2c-10  i2c             DPMST                                   I2C adapter

root #lsmod

Module                  Size  Used by
dm_crypt               49152  1
onboard_usb_hub        20480  0
xhci_pci               24576  0
xhci_pci_renesas       12288  1 xhci_pci
sp5100_tco             12288  0
mt7921e                32768  0
watchdog               40960  1 sp5100_tco
ucsi_acpi              12288  0
k10temp                12288  0
xhci_hcd              290816  1 xhci_pci
typec_ucsi             49152  1 ucsi_acpi
typec                  98304  1 typec_ucsi
roles                  16384  1 typec_ucsi
dm_mod                167936  3 dm_crypt
dax                    49152  1 dm_mod

root #sensors

thinkpad-isa-0000
Adapter: ISA adapter
fan1:        1765 RPM
CPU:          +42.0°C  
GPU:              N/A  
temp3:        +42.0°C  
temp4:         +0.0°C  
temp5:        +42.0°C  
temp6:        +42.0°C  
temp7:        +42.0°C  
temp8:       -108.0°C  

BAT0-acpi-0
Adapter: ACPI interface
in0:          13.00 V  

k10temp-pci-00c3
Adapter: PCI adapter
Tctl:         +43.4°C  

amdgpu-pci-0700
Adapter: PCI adapter
vddgfx:        1.45 V  
vddnb:       799.00 mV 
edge:         +40.0°C  
PPT:          10.00 W  

acpitz-acpi-0
Adapter: ACPI interface
temp1:        +42.0°C  (crit = +128.0°C)

Installation

Note
If there are plans to use EFI stub, disable Secure Boot as explained here.

Firmware

External firmware is required for the Wi-Fi module and AMD GPU:

root #emerge --ask sys-kernel/linux-firmware

Kernel

Tip
A third-party provided configuration file (kernel version 6.4.11) can be used as a template.

KERNEL All required external firmware (kernel version 6.4.11)

Device Drivers  --->
  Generic Driver Options  --->
    Firmware loader  --->
-*-   Firmware loading facility
        amdgpu/green_sardine_asd.bin amdgpu/green_sardine_ta.bin amdgpu/green_sardine_dmcub.bin amdgpu/green_sardine_pfp.bin amdgpu/green_sardine_me.bin amdgpu/green_sardine_ce.bin amdgpu/green_sardine_rlc.bin amdgpu/green_sardine_mec.bin amdgpu/green_sardine_sdma.bin amdgpu/green_sardine_vcn.bin mediatek/BT_RAM_CODE_MT7922_1_1_hdr.bin mediatek/WIFI_RAM_CODE_MT7922_1.bin mediatek/WIFI_MT7922_patch_mcu_1_1_hdr.bin regulatory.db regulatory.db.p7s

KERNEL Wi-Fi (MEDIATEK Corp. MT7922 802.11ax)

Device Drivers  --->
[*] Network Device support --->
[*]   Wireless Lan --->
[*]     MediaTek devices
<*>       MediaTek MT7921E (PCIe) support

KERNEL Bluetooth (MediaTek Inc. Wireless Device 0489:e0d8)

Networking Support  --->
<*> Bluetooth subsystem support  --->
      Bluetooth device drivers  --->
<*>     HCI USB driver      
[*]       MediaTek protocol support

KERNEL Touchpad/Trackpad (ELAN067F:00)

Device Drivers  --->
[*] Input device support --->
[*]   Mice --->
<*>     PS/2 mouse
[*]       Elantech PS/2 protocol extension
< >     ELAN I2C Touchpad support
[ ]   Touchscreens  ---
[*]   HID bus support
<*>     I2C HID support
< >       Driver for Elan hid-i2c based devices on OF systems
-*- Pin controllers
[*]   AMD GPIO pin control
    I2C suppoer
      I2C Hardware Bus support  --->
[*]     Synopsys DesignWare Slave
<*>     Synopsys DesignWare Platform

Configuration

Disable Secure Boot

To disable Secure Boot, the following steps must be performed:

Enable UEFI-only loading (no legacy support)
Set an administrator password
Disable secure boot

LTE modem

The modem is FCC locked. A script to enable the radio is installed by net-misc/modemmanager, but a link to it must be manually created:

root #mkdir -p /etc/ModemManager/fcc-unlock.d

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