I had a similar problem on a Hp Elitebook 8740w, no wi-fi in the installer and no cable internet either. The cable net was easily solved, just make sure the cable is attached to the router and PC before starting the PC/installer.
On startup after the install I could not get wi-fi at all with eConnMan, in fact pressing the wi-fi symbol button found on Elitebooks above the f-keys (inline with the power button, volume controls etc) meant that eConnMan turned my bluetooth on/off.
showed eth0 & lo, nothing else.
What I did to fix this was to do what I always do, any distro, any release: I installed wicd
and removed eConnMan. I know Linux is all about choice, but can someone tell me why anything other than wicd is ever a consideration? Wicd immediately searched and found all available networks and all I had to do to "configure" my wi-fi was to type my password. Done.
I also had a mesage on boot booting system without full network configuration
which I thought was related. It did not interrupt the boot process, (but google it and it looks like that is a problem for a lot of other people). So I ran
sudo dpkg-reconfigure lightdm
and that seems to have solved it. It isn't network related from what I can gather. Instead it is just the last error message you see before the real issue occurs. Also, it isn't a Bodhi thing, it's seems to be inherited from Ubuntu 14.x(04?) directly.
I hope this info helps someone else, really love this OS and want to see it continue (thanks go to Jeff and all the new people).