Ok, one other data point- I should have mentioned in the very beginning that 
I'm actually logging into the machine in question remotely, then issuing the su 
command.  This seems to make a difference.  While I THOUGHT the problem 
occurred either way, now I'm finding that if I actually sit down at the 
machine, log in via AFS, then enter su, there is no delay (and no xauth warning 
either) regardless of pam_xauth being in /etc/pam.d/su or not.  It's only when 
I ssh to the machine remotely, then try su that I see a delay if the pam_xauth 
line is in /etc/pam.d/su.

Sorry if this muddles things up a bit....

eric

--- On Thu, 3/18/10, Ken Hornstein <[email protected]> wrote:

> From: Ken Hornstein <[email protected]>
> Subject: Re: [OpenAFS] significant delay for afs user to login as root via su
> To: [email protected]
> Cc: [email protected]
> Date: Thursday, March 18, 2010, 8:10 AM
> >Just as another data point, when
> I try to su from a local account,
> >I experience no delay but /var/log/debug gives exactly
> the same output.
> 
> Humor me for a minute.
> 
> There should be in one of your pam config files a module
> called "pam_xauth"
> or something similar.  Try commenting it out and see
> if that makes a
> difference.
> 
> --Ken
> 



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