Try System 76: https://system76.com https://system76.com. They make systems that ship with Linux and have one or two aluminum models. Not sure if it meets the

Try System 76: https://system76.com https://system76.com. They make systems that ship with Linux and have one or two aluminum models. Not sure if it meets the "barebones" requirement you are talking about, though, as I usually associate that with desktop systems that have only the absolute minimum of components onboard. The Oryx Pro looks pretty nice, but battery life is apparently only around 2 hours, which leads me to believe it uses that 10-series discrete nvidia chip as its full-time GPU rather than using something like Optimus to switch between that and and integrated card.