About your P.D. How did you remove the software?
There are many ways you can erase software from Trisquel. It is different to do: sudo apt-get remove program than to do: sudo apt-get purge program and also sudo apt-get purge program*The last way will remove everything about that program, but you gotta be carefull, because it will also remove its dependencies, and that may cause that your sistem brokes.
