Public bug reported:

pkexec fails with the error:

ERROR:pkexec.c:138:pam_conversation_function: code should not be reached

in up-to-date Ubuntu 11.10. I have taken a look to the source code and it seems 
related to the fake conversation function used when PAM is invoked 
(pkexec.c:160 in packaged sources -.orig-). In my system I have a fprint PAM 
module to authenticate, but it also fails after disabling it.
Policykit authentication other than pkexec seems to work properly. A look at 
polkitagenthelper-pam.c shows that a proper concersation function is used.
I guess a similar function could be used for pkexec, but I have not enough 
skills on pam/policykit to address this.

Thanks in advance
Vreixo

** Affects: policykit (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/875402

Title:
  pkexec fails with ERROR:pkexec.c:138:pam_conversation_function: code
  should not be reached

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