Ok. So I managed to compile trinity on my gentoo. But I have some very
serious issues that prevent me from using it.

1). kdm don't recognize my password. every time I try to log-in it
gives me "Login failed" message. I am sure the password I type is the
correct one. And to be hones I don't know what could be causing this.
Anyway here is kdm.log: http://paste.pocoo.org/show/474009/ Not that
it contain many, but always...
2). nor kdm, nor gdm see trinity session. The
/etc/X11/Sessions/trinity file does not exist, like it does for
Gnome/whathever. How can I fix that? Use the startkde script form
kdebase?