Lenovo ThinkPad X1 Carbon (Gen 4)
Lenovo ThinkPad X1 Carbon, Gen 4.
To ensure you have this version, run dmidecode:
# dmidecode -t system | grep Version Version: ThinkPad X1 Carbon 4th
Updating the UEFI works like described here: link ThinkWiki BIOS Upgrade/Using UEFI.
|Wireless network configuration#iwlwifi||Yes|
|microSD card reader||Yes|
The fingerprint reader included with this model `138a:0090 Validity Sensors, Inc` currently lacks a linux driver. libfprint bugreport. Synaptics (which has acquired 'Validity Sensors') has unofficially said that they cannot disclose the protocol, but may possibly release a binary driver.
Open source Linux driver is being developed by reverse engineering the Windows driver. 
There are two options for displays:
- 14" FHD IPS (1920 x 1080): Works
- 14" WQHD (2560 x 1440): Works
Mini DisplayPort: Works
There are several cards used:
- Intel Dual Band Wireless-AC 8260, 2x2
- Intel WiGig 18260 AC 2x2
All cards feature BT4.1 connectivity and should work out of the box when starting the bluetooth service
There are several cards used
- 4G LTE (Huawei ME906S)
- Qualcomm Snapdragon X7 LTE-A (Sierra Wireless EM7455)