I think the first ThinkPad with a back-lid keyboard is the X1 (not Carbon). Later X230, T430 and W530 series introduced optional back-lid keyboard. They support both Think Light (the last generation having Think Light) and back-lid keyboard, but not simultaneously.
There is no back-lid keyboard for T400 series. However, you can try to DIY
one.
- [Trisquel-users] Is it possible to enable a keyboard bac... andrewandmelissao
- Re: [Trisquel-users] Is it possible to enable a key... xliang9550
