Delayed booting problem on F7

Karl Larsen k5di at zianet.com
Sat Oct 13 00:52:04 UTC 2007


David Timms wrote:
> Gordon Messmer wrote:
>> Karl Larsen wrote:
>>>    This morning I started the computer and it stopped for 10 minutes 
>>> because it could not find cups. It talked about applying iptables 
>>> but had "never matched protocal" and when it finally came up 
>>> Thunderbird was broken.
>>
> ...
>> After checking your SELinux settings, you should have checked 
>> resolution of your hostname.  To do this, start by establishing what 
>> your hostname is:
>>
>> # hostname
>> herald.private.dragonsdawn.net
>>
>> Then make sure that hostname can be resolved, either by the hosts 
>> file or DNS:
>>
>> # getent hosts `hostname `
>> 192.168.1.6     herald.private.dragonsdawn.net
>>
>> If you get an error from "getent", then you need to make sure that 
>> your hostname can be resolved.  You can do this by listing it in 
>> /etc/hosts, or by setting up the name in DNS.
> This is my suspicion for Karl's issue as well. Even though it isn't my 
> issue, I would like to confirm the root cause of the problem.
> A final test is does ping `hostname` actually get "reply"s ?
> ie: ping k5di
>
> Even if it the hostname is pingable now, I think it would not have 
> been pingable at the time when Karl had the initial problem. His 
> contents of /etc/resolv.conf showed the comment from dhclient. I'll 
> put down some further possibilities that may have led to this issue 
> {that seemed to resolve itself}.
>
> Since likely a DSL connection to the internet:
> - Network cable faulty or partially plugged in {wired} ?
>
> - Assuming a DSL router does the pppoe login:
>   - powered off
>   - rebooting at the inopportune moment {check the uptime of the router}
>   - relogging on due to inactivity timeout {check the router logs - 
> and that it time marks are correct time}
>   - failed to give out an dhcp address ?
>   - isp dns server down at the time the pc is trying to resolve its 
> hostname {instead of an instant ~"does not exist", PC's dns gets no 
> answer, timing out after 1 minute, then trying again a couple of 
> times...} {check the ISPs service status - decent ones tell you when 
> they have had issues} {also causes slow startup for thunderbird since 
> it can't resolve the mail server name}.
>   - the received dhcp address has a domain that does not exist {if I 
> set domain in my router's dhcp server as "zzz", then for eg sendmail 
> needs to be able to resolve `hostname`.zzz - it will timeout after 1 
> minute, try again, time out after the second minute, then sm-client 
> will also timeout - leads to a 3 minute boot delay}.
>
> - A change to a PC setting:
>   - hostname changed {and not updated in /etc/hosts} ?
>   - firewall config change ?
>   - package update {less /var/log/yum.log} ?
> eg: Sep 28 22:47:50 Updated: iptables-ipv6 - 1.3.8-2.1.fc7.i386
> eg: Oct 11 22:54:16 Updated: dbus-glib - 0.73-3.fc7.i386
> {it might help us to see the most recent 50 entries from yum.log}
>
> - An issue in a package
>   - network manager, dbus, dhclient, iptables ?
>
> - "fail to find cups and then sendmail":
>   - The description is poor. A better one might be "the system shows: 
> Starting cups ...  and then sits there for some minutes. This also 
> occurred at the starting sendmail / sm-client ... part". It is not 
> that the system can't find either of these programs, but that they are 
> taking more than normal time to startup.
>
> - "Thunderbird was broken"
>   - There was no further mention of the nature of the issue with 
> thunderbird. Was it delay in getting email ? Were there any error 
> messages ? what exactly was the issue ? Was it delay in starting 
> thunderbird at all ?
>
> I have found it useful to have a pen/paper near my computer so that I 
> can catch any weirdness as close to the letter as possible. I also 
> have an old digital watch there, so that I can time {in seconds} 
> something that seems to be taking to long - sometimes that is enough 
> to indicate the type of fault to others.
>
> I am sure there are more possibilities that can lead to the symptoms 
> described by Karl.
>
> DaveT.
>
None of the above.

Dr. Karl F. Larsen


-- 

	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.




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