Since 5.0 release there is no need for installing Xorg from pkgsrc, becouse it's in base installation. If you really had installed ALL sets, you probably have parallel two version of xorg, first from installation and second from pkgsrc. Maybe this is the problem?
Try also running gnome without gdm. Add
to your
.xinitrc file in home directory and try with [B[startx[/B]. If it works, maybe we will be able to resolve at least one problem, with working mouse.
Best Regards,
Tom