I am using Trisquel 6.0 with an SSD. A copy of my /etc/fstab is attached as /tmp/fstab.txt. You will see that the SSD has the options "noatime,discard".So far as I know, this ensures that the SSD will not be written to unnecessarily. The TRIM function is provided by the "discard" option.
Trisquel works very well with my SSD.
