H-node (www.h-node.org) is a database project which aims to collect
information about various kind of hardware like printers, scanners, webcams,
laptop models and internal parts of laptops and desktop computers like wifi
and video cards.
H-node seems to have your video card reported as compatible with Trisquel
5.5:
(http://h-node.org/videocards/view/en/614/NVIDIA-Corporation-G94--GeForce-9600-GT---rev-a1-)
Can you give the output of [b]lspci -nnk[/b] command after you run it on the
terminal? If the ID numbers you get are the same as (10de:0622) then your
device is the same which can be found in h-node and it should work with
Trisquel 5.5.
Can you test your laptop with Trisquel 5.5?