[CentOS] Boot process slow with rhgb quiet on

[Robert]

Dave Gutteridge wrote:

>
> If I boot with "rhgb quiet" off, my computer boots in 1 minute and 30 
> seconds.
>
> If I boot with "rhgb quiet" on, my computer boots in 3m11s. That's a 
> long time to wait.
>
> Significantly, when booting with "rhgb quiet", right at the moment X 
> takes over, there is a 1m36s pause where the screen is blank except 
> for the hourglass cursor turning around and around.
>
> Of course, if my main priority was to simply boot quickly, I would 
> simply remove the "rhgb quiet" option from the boot process. And I'm 
> not opposed to doing that.
>
> However, this pause only started happening recently, so I wonder why 
> it exists at all.
>
> When booting with "rhgb quiet" off, I tried to look for any errors or 
> indications of a problem, but it seemed to boot mostly without pause 
> or error. There was one message which was like an error warning, which 
> said something about a "microcode device doesn't exist?". But text was 
> moving across the screen quickly and I couldn't write down exactly 
> what it said.
>
> Before I give in and remove the "rhgb quiet" option permanently, is 
> there any way I might be able to diagnose and fix this delay problem? 
> I'd rather be telling the computer how to boot, instead of it telling me.
>
> Dave
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>
By chance, did this slowdown or hang or whatever begin after you made a 
change(s) to your  /etc/resolv.conf or /etc/hosts or 
/etc/sysconfig/network files?  Specifically, check this warning in 
/etc/hosts. 

cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1       localhost.localdomain   localhost

FOR SURE, a problem with  the resolver will cause sendmail to hang for 
approx 60 seconds.