Lenovo ThinkPad T570
Use the Installation guide. Make sure that Secure Boot is disable in BIOS Setup.
Install this BIOS update (or a newer one) to fix a serious bug concerning hyperthreading and issues with thunderbolt   , which can affect you even if you don't use thunderbolt.  See Flashing BIOS from Linux for details on how to install the BIOS without an optical drive; the AUR method is known to work on the T570.
Until bbswitch is updated to support the new power management method, add
pcie_port_pm=off to your kernel parameters.
If you have a very weak bluetooth signal when using wifi, make sure you have a recent https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1721271 for more information.. See