Lenovo ThinkPad T14 (AMD) Gen 2

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
Smartcard reader	`058f:9540`	Yes
NFC reader	???	No
SIM	???	No

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.

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, the fingerprint reader and the NVMe controller.

November 2021 security update

On November 4, 2021 Lenovo pushed System Firmware Version 1.12, a UEFI/BIOS update, to LVFS. This is described as a security update (although without further detail). See LVFS page for this update.

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.

Note that keeping the Microsoft Certificates should not brick the machine.

Realtek Ethernet

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)

is the RJ45 port. enp2s0f0 is the proprietary connector next to the 2nd USB Type-C port for use in the Lenovo ThinkPad Ultra Docking Station or with a Lenovo ThinkPad Ethernet Extension Cable Gen 2 cable.

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

Unreliable mic mute LED

The mic mute LED on key 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 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 to the kernel command line results in a different complaint:

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

Freezing Trackpad

The trackpad may freeze randomly. The cure is to unload the psmouse module with rmmod and reload it with modprobe.

Fingerprint reader unavailable after suspend

There have been reports that while the fingerprint reader works well with fprintd after a cold start (including wake from hibernation) it vanishes from the list of available devices after sleep or suspend. As of July 2022, with the latest system firmware updates applied, this issue now seems to be resolved.

AMD P-State

Starting with kernel 5.17, AMD processors should have more finesse in frequency control due to the inclusion of the AMD p-states driver. Unfortunately, the acpi_cprufreq driver does not play well with others. To get it working, blacklist by adding the entry to the file and force the loading of by creating an file with "amd_pstate" as its contents. Confirm if it has worked by running to confirm the driver being used.

Sleep mode (S3)

Sleep mode and, in particular, the lid switch are slow and flaky unless the sleep mode is set to rather than 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
	Yes	Yes	Toggles Fn lock
`F1`	Yes	Yes
	Yes	Yes
	Yes	Yes
	Yes	Yes
	Yes	Yes
	Yes	Yes	`XF86MonBrightnessUp`
	Yes	Yes
`F8`	Yes	Yes
	Yes	Yes
	Yes	Yes
	Yes	Yes
`F12`	Yes	Yes
	No	Yes	Controls the keyboard backlight
	Yes	No
	Yes	No	`Scroll_Lock`
	Yes	No
	Yes	No	`Alt_L`
	Yes	No
	Yes	No
	Yes	No	`Home`
	Yes	No

gollark: Oh, that looks like one of the ABR telephone diagrams but more complicated!

gollark: Oh, 1294-Y-3 then.

gollark: [REDACTED] memetic campaign 1294-Y.

gollark: That doesn't reference messages, merely people.

gollark: I mean, it's partly GTech™ orbital weather management arrays. But weather is a complex chaotic system, so we don't *entirely* control it.