add a special Provides: to all login manager packages

Colin Walters walters at
Wed Feb 18 23:10:04 UTC 2009

On Wed, Feb 18, 2009 at 5:37 PM, Colin Walters <walters at> wrote:
>  Changing the login system has a *huge*
> impact on how everything works and could easily result in confusing
> problems higher up the stack.

Just to give a concrete example, how GDM uses PAM is highly
nontrivial, involving separate processes because of PAM's
ill-specified nature among other things.  GDM also interacts with
various complex cases like smartcards that in turn involve other
system daemons.  There is quite a bit happening inside GDM/PAM even on
a default desktop that may not be obvious, such as how gnome-keyring
saves your password to unlock the keyring.  How gnome-keyring works
depends on various bits of infrastructure including dbus (this is a
tricky issue).  NetworkManager in turn depends on gnome-keyring.

So yes, swapping out the login manager could quite easily result in
not being able to log in to your WPA network. It turns out an
operating system is a very complex thing, and we have plenty enough
bugs without people trying to replace parts of it without coordinating
with consumers higher up the stack.

Anyways...back to those bugs.

More information about the fedora-devel-list mailing list