YES! I do have experience with this! I have a T400.
After you install libreboot (with a grub payload), turn on your T400. When you get to the libreboot grub payload, then insert your usb stick with guix on it. There are several options to choose to boot. I think that you have to choose the "external media" boot option...something like that. Then it should boot into the guix installer. For whatever reason, I could only get guix to work on libreboot with 1 / ext4 partition. Any other option install guix, but I could not boot into guix after it was installed. Thanks, Joshua -- Joshua Branson Sent from Emacs and Gnus https://gnucode.me https://video.hardlimit.com/accounts/joshua_branson/video-channels https://propernaming.org "You can have whatever you want, as long as you help enough other people get what they want." - Zig Ziglar
