Re: [Trisquel-users] Is it possible to enable a keyboard backlight on Lenovo T400?

[xliang9550]

There is no back-lid keyboard for T400 series. However, you can try to DIY  
one.

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.