The dvb-mb package don't contain the vtuner module, and the vtuner package is not compatible to the dvb-mb package. You can't use both on the same system.
On my Ubuntu pc i use crazycat media_build and vtuner module on the same system.
I had to build vtuner with crazycat media_build include files and it works great.
You can do that too.
Anyway,why dvb-mb package isn't working?
Yesterday, i installed Tvheadend on MLD therefore i had to manually copy some libs to /usr/lib/x86_64-linux-gnu
Doing so can cause problems?