Trisquel doesn't seem to be the only one experiencing this issue.
Ubuntu and (GNU/)Linux Mint seem to have the same issues as well.
I have found three plausible solutions after researching exit code 141:
1) Are you using a RAID setup for another OS? Apparantly there are issues
where a live instance tries to access the RAID array for possible
installation paths and fails. You will need to press F6 at the initial
installation screen (on the live instance) and define No RAID disks
(nodmraid).
2) Do you have more than 1 HDD/SSD in your machine? Someone solved their
problem by removing the HDD they were not going to install GNU/Linux to and
put it back after the installation was complete.
3) Have you tried formating the partition you were installing Trisquel using
GParted. Some people reported that formatting an existing partiton using the
live version causes issues.
Procedure: Boot Trisquel LiveUSB --> Install GParted --> Format Partition -->
Reboot --> Go through LiveUSB installation like usual.
I had no issues installing Trisquel from liveusb so I have no knowledge if
these will work or not.
I hope these can be of help.
