It's easy to verify, just apt-get purge kernel-module-cifs before trying to mount your share ... Please do it and report, then all users can benefit from this investigation without a doubt leaving ... A++
/home/user # dpkg -l | grep cifs rc kernel-module-cifs 1.55.0-maemo1-ac0 CIFS, Samba, Windows File Share support /home/user # apt-get purge kernel-module-cifs Reading package lists... Done Building dependency tree Reading state information... Done Package kernel-module-cifs is not installed, so not removed 0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.