If that happened recently, I know the reason. hal recently deprecated the "info.bus" property, thus libgphoto2 (and libsane, too, see bug 205496) need to generate FDIs with "info.subsystem", not "info.bus".
If that happened recently, I know the reason. hal recently deprecated the "info.bus" property, thus libgphoto2 (and libsane, too, see bug 205496) need to generate FDIs with "info.subsystem", not "info.bus".