UPDATE 12-6-2014 : Just in case it helps: Resume works perfectly using kubuntu-desktop in standard Ubuntu. Also, NVIDIA driver works perfectly using kubuntu-desktop, but using Kubuntu I must select Xorg driver, because choosing Nvidia one there is a risk to lose the system (wrong display).
UPDATE 12-6-2014 : Just in case it helps: Resume works perfectly using kubuntu-desktop in standard Ubuntu. Also, NVIDIA driver works perfectly using kubuntu-desktop, but using Kubuntu I must select Xorg driver, because choosing Nvidia one there is a risk to lose the system (wrong display).