I did not try in Linux, but you may look in the "tr.conf" file located inside TR installation path (or maybe in /etc or /opt/etc depending how you installed TR).
In that file, look for the following line :
default_options="--locale fr:FR --laf javax.swing.plaf.metal.MetalLookAndFeel
--branding tr -J-Xms64m -J-Xmx256m -J-XX:PermSize=64m -J-XX:MaxPermSize=256m
-J-Dsun.java2d.noddraw=true -J-client -J-Xverify:none
-J-Dorg.netbeans.ProxyClassLoader.level=1000 --fontsize 11"
I changed
--fontsize to get more info on my screen, and at least in windows, it did work. Hope that will help.
N.