User:Holgersson/Lenovo Thinkpad T14s (AMD) Gen 1
Lenovo Thinkpad T14s (AMD) Gen 1
This article covers specific aspects of the T14s when running with Gentoo. Plenty details are already covered by the wiki article on wiki.archlinux.org, see External ressources.
Follow the instructions on AMDGPU. AMD SME seems to be unsupported by the hardware, so enabling it inside the kernel has no (negative) effect.
The sound chip needs >=media-sound/pulseaudio-14.0.
Micro-SD card reader
The µSD card reader works.
Touchpad and trackpoint
The touchpad vendor is Elantech, not Synaptics and the driver suggests in dmesg to use the SMBus interface instead of PS2:
CONFIG_MOUSE_PS2=m CONFIG_MOUSE_PS2_SYNAPTICS=y CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS=y CONFIG_MOUSE_PS2_TRACKPOINT=y CONFIG_MOUSE_PS2_ELANTECH=y CONFIG_MOUSE_PS2_ELANTECH_SMBUS=y CONFIG_MOUSE_PS2_SMBUS=y
Webcam and IR webcam
Both webcams are working. For the IR webcam take a look at projects around the howdy project, that enable the IR transmitter. In my case this project worked: 
Please keep in mind that unlocking with biometric data should be considered unsafe.
sound over HDMI
Xorg: Screen re-enabled when HDMI is attached
Spamming the shut-off command 'xset dpms force off' until all external screens really shut off also works
- wiki.archlinux.org on the T14s
- example kernel configuration - in daily usage, but might have special assumptions, should work with gentoo-sources