Ubuntu used a patch for this, but it's just a work-around for now and multiple upstream's developers told me that is not the right approach to use. -- debbug#555134 ...
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ID Status▲ Resolution Sev Product▲ Comp▲ Assignee▲ Reporter▲ Summary
24847 NEW --- nor Sisyphus lxde-lxd antohami ldv required pam_setcred() calls are missing

File a new bug in the "lxde-lxdm" component of the "Sisyphus" product