Welcome to Trisquel :D
If I'm not wrong that laptop has an intel GPU (probably a Intel GMA950 or an
Intel X3150), so there is no need for any adjustment at all and the
resolution should be found by default.
Did you noticed that problem using the LiveCD of Trisquel or only after the
install ?
If the monitor appears as "unknown" then it is probably a problem with the
reading of the EDID (binary file stored on the monitor memory that saves all
the useful informations about the monitor itself like the resolution for
example), so try the 2 fallowing things if there is also a problem on the
LiveCD.
'''1 -''' Remove your /etc/X11/xorg.conf if any. and logout, if the
resolution is good then fine, else try the 2º option.
'''2 -''' Create a file at /etc/X11/ named xorg.conf like this '''sudo gedit
/etc/X11/xorg.conf''' on the terminal, and then copy paste this :
'''Section "Device"
Driver "intel"
Option "UseEDID" "true"
Option "IgnoreEDIDChecksum" "CRT,DFP,TV"
EndSection'''
But I'm pretty sure neither the 2 solutions should be necessary at all. If
this doesn't help, and the LiveCD also shows you a low resolution they tell
me so I could help you in another way.
