Looking at your Xorg.0.log I notice you're on the default kernel. The solution might be as simple as installing a newer one as
nouveau is in development.  You have a choice of package:

linux-generic-lts-belenos

Which is a Trisquel supported 3.5.x kernel. Or if that doesn't work or you want to go the whole hog then jxself's kernel is pre-built for Trisquel see:

http://jxself.org/linux-libre/

Reply via email to