ThinkPad T440p – the new most tough, modifiable, relatively cheap and widely available Coreboot supported laptop (thank you to Coreboot v. four.11)! : linux
Btw, despite the fact that you do not put Coreboot on it, do not put out of your mind to take away (in part) the Intel ME backdoor with the me_cleaner instrument. Thankfully as a result of the CPU’s technology is < Skylake, we will be able to take away 94% of Intel ME:
For technology 2 (Nehalem-Broadwell, ME model between 6 and 10) this instrument gets rid of virtually the entirety, leaving most effective the two basic modules wanted for the proper boot, ROMP and BUP. The firmware measurement is diminished from 1.five MB (non-AMT firmware) or five MB (AMT firmware) to ~90 kB.
For technology three (from Skylake onwards, ME model >= 11) the ME subsystem and the firmware construction have modified, requiring considerable adjustments in me_cleaner. The basic modules required for the proper boot at the moment are 4 (rbe, kernel, syslib and bup) and the minimal firmware measurement is ~300 kB (from the 2 MB of the non-AMT firmware and the 7 MB of the AMT one).