To confuse matters further, there is a post from a Lenovo "product expert" claiming that Signature Edition PCs have to lock out Linux users because Microsoft says so.Signature Edition PCs differ from other systems because they are free from the usual bloatware or other junk that clutter up regular PCs.Also, the most current BIOS and firmware versions for the Think Pad X61 Tablet are 1.23 and 1.03, respectively.Disclaimer: While these steps worked for me while upgrading my X61 BIOS from 1.06 to 2.07, and later from 2.07 to 2.14 and 2.14 to 2.20, use them at your own discretion.Not even the Lenovo Thinkpad USB CD-ROM drive allows the user to upgrade the BIOS.Officially, the supported method for an x61 upgrade on a non-Win32 platform is to use the CD-ROM drive in an ultrabase. It is the new second-generation, type “20A7” laptop, based on Intel’s Haswell microarchiteture with the adaptive keyboard. I also ordered the Thinkpad One Link Dock which I have returned for the One Link Pro Dock which I have not yet received.
It's designed for desktops, but this project is also usable on phones, tablets and on headless servers.If you're looking for a "clean" PC then the Signature Edition systems are indeed worth a look (well, if you're happy with Windows 10 at any rate). On first blush this seems to be an issue relating to how Lenovo has configured the systems.I can't find any evidence to suggest that Microsoft is trying to "lock" Signature Edition PCs to Windows 10, or making any moves to shut the door on Linux users (using some proprietary RAID mode that even requires Windows 10 users to download and install a separate driver from Lenovo would seem to be an odd way to achieve this).This alone suggests that the problem is related to how the systems have been configured by Lenovo, and not some shady deal foisted upon them by Microsoft.Additionally, it's hard to believe that a random Lenovo representative posting on a forum would know of any deals struck between the OEM and Microsoft regarding locking out Linux users.