Bug#484268: gdm: small login delay after password has been entered

[Nikolaus Schulz]

On Tue, Jun 03, 2008 at 01:21:12PM +0200, Josselin Mouette wrote:
> Le mardi 03 juin 2008 ?? 12:52 +0200, Nikolaus Schulz a ??crit :
> > after one has entered the password at the login screen, there is always
> > a small delay of roughly 1-2 seconds[1] before gdm clears the screen.
> > This is a bad thing, because basically this delays the signal that the
> > password has been accepted, leaving the user with a (albeit short)
> > period of uncertainty if he can e.g. move on and fetch his coffee or if
> > he has to re-enter the password because he mistyped it.  Note that the
> > gdm in Etch does *not* exhibit such a delay.
> 
> I think this might be caused by pam_gnome_keyring. Does it still happen
> if you comment the related line in /etc/pam.d/gdm?


I've tested with disabling the following line there: 

    auth    optional        pam_gnome_keyring.so  

by restarting gdm inbetween and running 

    echo 3 > /proc/sys/vm/drop_caches

... which I hope is enough to give comparable values.  But I don't see a
noticable difference.  The delay is between 1 and 1.5 seconds,
regardless of the pam setting.  I've pretty much no clue how pam works.
Is there anything else I could try to track this down?

Nikolaus