Red Hat Bugzilla – Bug 19915
During an upgrade from 6.0 to 7, the PAM configuration is broken
Last modified: 2007-03-26 23:37:02 EDT
An upgrade from 6.0 to 7 breaks the PAM configuration, resulting in the
inability to log in after the upgrade. 6.0 is confirmed, and 6.1 is
probable. I haven't checked 6.2 yet (and that may be a while), nor have I
researched this thoroughly. I'll update when I get a chance.
Booting with "linux single" and re-running authconfig fixes the problem for
both of the customers that I've dealt with on this issue.
Upgrades don't correctly detect if shadow passwords are disabled, and they are
enabled by default. This does not show up on fresh installations because
authconfig is run by the installer to toggle these settings. A test version of
the package which correctly handles this transition is at
http://people.redhat.com/nalin/test/. Please see if it fixes the problems
Corrected in the errata release.