Lenovo ThinkPad T14 (AMD) Gen 2

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Hardware PCI/USB ID Working?
Trackpoint Yes
Touchpad Yes
Keyboard Yes
GPU 1022:1638 Yes
Webcam (Non-IR) 04f2:b724 Yes
Ethernet 10ec:8168 Yes
Bluetooth (Realtek) 0bda:4852 Yes
MicoSD-card reader 17a0:9750 Yes
Audio 1022:15e2 Yes
Wireless (Realtek) 10ec:8852 Yes
Fingerprint reader 06cb:00bd Yes
TPM 1022:15df Yes

Accessibility

High contrast black on white with large type. Unfortunately the selected menu item is indicated with faint dotted lines, which would make it hard to read for those with visual limitations. Under the Config tab, there is a Setup UI item that toggles the BIOS look-and-feel back to the old-school Thinkpad grey-blue-and-white, all-text, keyboard navigation mode, which may be easier. A table of navigation keys is found under the heading "Navigate in the UEFI BIOS interface" on p.31 of the user guide.

Note: Blind users should request the help of a sighted person to change BIOS settings.

This device has no diagnostic LEDs but relies on audible beep codes. However, those codes can be translated into visible form by using Lenovo's SmartBeep app. This is described under the heading "Beep errors" on p.53 of the user guide.

Firmware

fwupd

fwupd supports the UEFI BIOS, the webcam and the NVME controller.

Secure boot

For a number of Lenovo laptops of the same cohort, it has been reported that deleting SecureBoot keys and substituting your own keys bricks the the motherboard. Further, Lenovo classifies this as caused-by-customer and thus outside the scope of warranty coverage. See here for Lenovo forum threads on XC17,T14s and T14 (AMD) Gen 1.

You break it, you keep both pieces.

Realtek WLAN

As of kernel 5.13.8, the Realtek 8852 wireless card requires rtw89-dkms-gitAUR.

Realtek Ethernet

lspci shows two distinct Ethernet controllers:

$ lspci | grep Ethernet
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0e)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)

However, enp2s0f0 does not seem to be configurable and shows as having no carrier even when the RJ45 is attached and enp5s0 shows carrier:

$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp2s0f0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
    link/ether 38:f3:ab:f4:0a:b9 brd ff:ff:ff:ff:ff:ff
3: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 38:f3:ab:f4:0a:b8 brd ff:ff:ff:ff:ff:ff
5: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DORMANT group default qlen 1000
    link/ether 14:5a:fc:1b:d5:15 brd ff:ff:ff:ff:ff:ff

Check ip link to see what interface has carrier and then set up that interface.

Unreliable mic mute LED

The mic mute LED on key F4 stays on even when the mic is live. This is a problem shared by the AMD Gen 1 T14 as well, per the relevant thread in the Lenovo Ubuntu support forum. Confirm the actual status of the mic before saying anything you may come to regret on a Zoom call.

Synaptics touchpad RMI bus non-functional

The Synaptics touchpad uses the psmouse module rather than its native RMI bus, which is qualitatively superior. dmesg says:

[    2.148382] psmouse serio1: synaptics: queried max coordinates: x [..5678], y [..4694]
[    2.184193] psmouse serio1: synaptics: queried min coordinates: x [1266..], y [1162..]
[    2.184214] psmouse serio1: synaptics: Your touchpad (PNP: LEN2073 PNP0f13) says it can support a different bus. If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 and report this to linux-input@vger.kernel.org.

Following that advice by adding psmouse.synaptics_intertouch=1 to the kernel command line results in a different complaint:

[    2.217261] psmouse serio1: synaptics: Trying to set up SMBus access
[    2.220337] psmouse serio1: synaptics: SMbus companion is not ready yet.

For more, see the relevant thread in the Lenovo Ubuntu forums and related kernel bug report.

Sleep mode (S3)

Sleep mode and, in particular, the lid switch are slow and flaky unless the sleep mode is set to Linux rather than Windows 10 in the BIOS. Be sure that you have logged out of, rather than suspending, any Windows 10 installation before changing this.

Function keys

Key Visible? Marked? Effect
Fn+Esc Yes Yes Toggles Fn lock
F1 Yes Yes XF86AudioMute
F2 Yes Yes XF86AudioLowerVolume
F3 Yes Yes XF86AudioRaiseVolume
F4 Yes Yes XF86AudioMicMute
F5 Yes Yes XF86MonBrightnessDown
F6 Yes Yes XF86MonBrightnessUp
F7 Yes Yes XF86Display
F8 Yes Yes XF86WLAN
F9 Yes Yes XF86NotificationCenter
F10 Yes Yes XF86PickupPhone
F11 Yes Yes XF86HangupPhone
F12 Yes Yes XF86Favorites
Fn+Space No Yes Controls the keyboard backlight
Fn+b Yes No Control_L+Break
Fn+k Yes No Scroll_Lock
Fn+p Yes No Pause
Fn+s Yes No Alt_L Alt_L+Sys_Req
Fn+4 Yes No XF86Sleep
Fn Yes No XF86WakeUp
Fn+Left Arrow Yes No Home
Fn+Right Arrow Yes No End

See also