Re: su hangs for 30 seconds

Roberto Ragusa <mail@xxxxxxxxxxxxxxxx> writes:
> Joachim Backes wrote:
>> On 12/05/2009 01:32 PM, Hiisi wrote:
>>> 2009/12/5 Wolfgang S. Rupprecht<wolfgang.rupprecht@xxxxxxxxx>:
>>>>
>>>> As of a day or so ago "su" has started hanging for 30 seconds.  So has
>>>> the lock screen.  Jiggling the mouse unblanks the monitor and shows me
>>>> the backdrop picture but the password entry box doesn't appear for 30
>>>> seconds.  I don't believe I mucked with anything PAM related, but there
>>>> were a few yum updates in the last few days.  Is anyone else seeing
>>>> this?

>>> I have the same problem for a couple of month (don't remember exactly
>>> how long it is) on my F11 (32 bit). I've asked it already on this list
>>> but had no response.
>> I had similar problems in the past (with sudo / not su), and the reason
>> was an error in the network controls (I tried to change the hostname by
>> editing /etc/sysconfig/network, but forgot all other places to edit).
> This kind of delays are often DNS timeouts.
> If the network configuration is wrong, trivial things like printing
> "last unsuccessfull login on 02-12-2009 from abcd.example.com"
> take 15-30-60 seconds.

Hmm.  No 6 hours after posting this, the problem cleared up.  I'm temped
to finger the selinux-targeted-policy that I installed from
updates-testing for clearing things up.  That was the only change in the
intervening time.

As to the DNS issue.  Bingo.  /etc/resolv.conf to be exact still had an
old IPv6 address in it.  Oops.  I thought that the resolver should
failover and stay locked to the best dns server fast than 30 seconds.  I
see I'm going to have to figure out why it took so long.  Thanks for
reminding me to double check.

    search wsrcc.com
    nameserver 2001:5a8:4:7d0::1
    nameserver 192.83.197.1
    nameserver ::1
    nameserver 127.0.0.1

-wolfgang
--
Wolfgang S. Rupprecht
If the airwaves belong to the public why does the public only get 3
non-overlapping WIFI channels?

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