Re: [Trisquel-users] I am thinking of installing debian then trisquel on my libreboot laptop,

[dguthrie]

You can install like this:  
https://libreboot.org/docs/gnulinux/encrypted_trisquel.html
I'm not sure if you can dual-boot though.
What do you need Debian for that Trisquel does not have (they can be set up  
to be exactly the same)? If you are using it for newer software (testing or  
unstable?) then Trisquel 8 is coming out soon which will have very new  
software, based on Ubuntu 16.04.