[gentoo-user] xdm doesn't restart on killed X

[Doki Pen]

I've recently switched from gdm to xdm in an effort to reduce my distro
size.  The only problem I've run into is that when I kill my X session,
xdm doesn't restart automatically.  I have to switch to a vtty and type
exec sudo /etc/init.d/xdm restart.  I've read the man pages and googled
but can't come up with a solution.  Does anyone know if there is a way
to fix this issue?