su takes several seconds ?!

[xiaweitang]

This is very strange. When i want to change to root user from normal user by "su", it sometimes takes several seconds before showing the new prompt! I have never seen this in using Linux.

[InExile]

Do you have any external authentication configured like winbind or nis or ldap?

[xiaweitang]

I don't think so. I don't even understand what are winbind or nis or ldap.

[patrikas]

I have seen situations like this with huge shell startup (.bashrc, .cshrc, profile) scripts. My laptop takes more than a second with many bash completions enabled.

[krinn]

Certainly depend on that bug, and will be also be fix https://forums.gentoo.org/viewtopic-t-817522-highlight-.html

Sure it's the time taken to fail to resolve the dns

[xiaweitang]

I tried the suggested /etc/hosts file, but the prolem remains. Note that it's not happening always, but randomly.

[NathanZachary]

Do you also see a delay between hitting "enter" after typing your username and the password prompt appearing?
_________________
“Truth, like infinity, is to be forever approached but never reached.” --Jean Ayres (1972)
---avatar cropped from =AimanStudio---

[xiaweitang]

[NathanZachary]

Try stopping all network-related services temporarily, and then issuing the su command. For instance:

[xiaweitang]

[NathanZachary]

Okay, then it is probably not anything to do with your network. Try changing your password for your root user. Just temporarily, make it something short and simple.
_________________
“Truth, like infinity, is to be forever approached but never reached.” --Jean Ayres (1972)
---avatar cropped from =AimanStudio---

[xiaweitang]

I changed the password to only two letters, but the problem remains.

[NathanZachary]

I will see what else I can find about the problem, but those were the two potential reasons I knew (networking and password change).
_________________
“Truth, like infinity, is to be forever approached but never reached.” --Jean Ayres (1972)
---avatar cropped from =AimanStudio---

[xiaweitang]

It seems the delay only happens in X, not in console.

[xiaweitang]

I'm almost sure the problem only happens when firefox is running.

[Raptor85]

Have you had flash running in firefox at times when this is happening? I've seen flash eat up tons of resources bogging the entire system, causing delays like this, even when all the tabs no longer have it actively running. Try running "top" while this is happening and look at memory usage/cpu usage.

[Mike Hunt]

Try running the command:

[xiaweitang]

[Mike Hunt]

Try this:

• logout your X session to a console
  
• run:

  Code:

  :> ~/.Xauthority

  
  
• login your X session

and post the output of this please:

[Deathwing00]

Moved from Installing Gentoo to Networking & Security.