According to mg_cfg, it looks as though it is possible to set up logging for MGcamd....
I have set:-
L: { 04 } /tmp/mgcamd.log
assuming that all MG activity would be logged to /tmp/mgcamd.log
So far nothing appears, so I guess MGcamd isn't working at all.
What do I need to check to make sure my installation is working?