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Bug 96987 - booting laptop with Ethernet cable disconnected is extremely slow
booting laptop with Ethernet cable disconnected is extremely slow
Product: Red Hat Linux
Classification: Retired
Component: net-tools (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Phil Knirsch
Ben Levenson
Depends On:
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Reported: 2003-06-07 17:14 EDT by Mitsu Hadeishi
Modified: 2015-03-04 20:12 EST (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2003-06-27 08:12:32 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Mitsu Hadeishi 2003-06-07 17:14:46 EDT
Description of problem:

I have a laptop with a wired Ethernet adapter and no wireless card (I have a
wireless card, but this problem occurs when there is no network connection,
wired or wireless).  When booting with the Ethernet cable disconnected, booting
is intolerably slow.  (In particular, it hangs for a very long time for most
network operations, particularly sendmail startup, but also in many other places).

This problem doesn't go away until I reconfigure the BIOS so the Ethernet
adapter is invisible to the OS.

Version-Release number of selected component (if applicable):

How reproducible:


Steps to Reproduce:
1. Configure RH9 system with wired Ethernet adapeter.
2. Boot system with no cable attached to Ethernet card
Actual results:

Very very slow boot, hangs in many places, and still slow even after boot.

Expected results:

If the cable is disconnected the system should act the same as if there is no
Ethernet card attached.  At the very least the timeouts should be shorter.

Additional info:

My Ethernet adapter is the one built into the Dell Inspiron 8200, a 3Com 3C5x9 I
Comment 1 Phil Knirsch 2003-06-27 08:12:32 EDT
That is also pretty much to be expected. Simply unplugging your network cable
doesn't disable the networking in Linux so it will try to resolve names, make
connections etc, and without a network connection this will take time to
timeout. Imagine you would have just a bad network connection, you still would
want to the network to operate, right? So the timeouts are there for a good reason.

If you want to disable networking, then do so buy booting in runlevel 2 or by
disabling the interfaces during bootup.

Read ya, Phil

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