Comment 2 for bug 1254830

LGDN:

That error message is known, one of the developers wrote about it here: (not sure why it was only posted there and not on launchpad, I guess it doesn't automatically post to both and maybe he forgot.

http://sourceforge.net/p/cdemu/bugs/73/

In short, he recommends using the session rather than system bus, unless you have a specific reason not to, in which case he recommends " to build and install daemon from the source yourself."

The Mechanist
This also seems to be caused by some issue with the vhba dkms module not being built according to the same developer. See:

http://sourceforge.net/p/cdemu/bugs/72/

If you want to verify that is what is happening try this, which is posted in that thread:

please check:
a) if vhba module is properly built (i.e., check the output of 'modinfo vhba' after booting new kernel)
b) after daemon autostart fails, what is the output in daemon's log file; by default, the log file should be called .cdemu-daemon.log and located in your home folder, so you can check if for example using 'cat ~/.cdemu-daemon.log'

Unfortunately I don't really have a better suggestion than to remove and reinstall the package, but that did seem to work for the previous case.

I packaged cdemu for trusty, and if I leave it on "use session bus" it works for me (this in Lubuntu Trusty). I suspect only the developers can say definitively why it does that, though I would guess it has to do with some incompatibility of the present version with Gnome3, as Lubuntu is I believe mostly (entirely?) based on GTK/Gnome 2.