Yes, the movie is called Valo and it tells one story from the life of Aleksanteri Ahola-Valo. The movie is directed by Kaija Juurikkala in 2005, and is based on Koulupojan päiväkirjat (Schoolboys diaries), a series of stories in a diary-like form, written by Ahola-Valo himself.
Good thing you brought up this one! It's an important true story and a good movie. Didn't remember the movie while making a list earlier in the thread..
A few more links:
The movie: Valo (elokuva ? Wikipedia)
Aleksanteri Ahola-Valo: Aleksanteri Ahola-Valo ? Wikipedia
Schoolboys diaries: Koulupojan päiväkirjat ? Wikipedia
..And a decent dictionary on the net: Sanakirja.org - Ilmainen sanakirja. Englanti, suomi, ruotsi jne. nettisanakirja