In reply to comment#11 - su pam support (which is added by downstream patch) changed quite a lot recently - we merged SUSE and RedHat pam support patch to consolidate these two distributions. However, there was one change in pam between F15 and F16 - trying to support ecryptfs mount of "Private" - #722323 . But even that change was not sufficient to make it working and probably was not correct.
Anyway, adding Tomas Mraz to CC as he is more experienced with pam.
In reply to comment#11 - su pam support (which is added by downstream patch) changed quite a lot recently - we merged SUSE and RedHat pam support patch to consolidate these two distributions. However, there was one change in pam between F15 and F16 - trying to support ecryptfs mount of "Private" - #722323 . But even that change was not sufficient to make it working and probably was not correct.
Anyway, adding Tomas Mraz to CC as he is more experienced with pam.