Open a new “xterm” / “gnome terminal” / “kde terminal” window which runs a “bash” or a “[t]csh” shell and then inside of this terminal execute for “bash”:
source /Full/Path/To/Your/Root/bin/thisroot.sh
or for “[t]csh”:
source /Full/Path/To/Your/Root/bin/thisroot.csh
and then in the same window try to run “root” (note: you need to run “source /…/bin/thisroot.[c]sh” in any newly started terminal window if you want to use “root” inside of this terminal).
Do you get the graphical “splash image” displayed for the first 5 seconds?
See also: [url]ROOT - No graphical output shown