*** This bug is a duplicate of bug 26175 *** This is not the right solution for your problem - you just need to change group ownership of /etc/shadow to "shadow". This was cased by kde-guidance bug.
** This bug has been marked a duplicate of bug 26175 Can't unlock session -- kcheckpass failure https://launchpad.net/malone/bugs/37919 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs