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Hang when unplug lan wire

Asked by Judo

I use Lenovo G475 notebook. When I unplug lan wire it will be hang.(can not boot) But when I plug lan wire into my notebook it no problem. During I use my notebook when I unplug lan wire it will show message "Disconnect-you are now offline" and go to hang. When I used the "Disconnet Munu" and unplug lan wire it same(go to hang). How can I do to fix the problem.
                    thank you so much.
                           Jodo from Thailand

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actionparsnip (andrew-woodhead666) said : 		#1

Do you have the latest BIOS?

Can you give the output of:

cat /etc/lsb-release

Thanks

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Judo (963505-gmail) said : 		#2

More information for this problem.
Hardware
AMD E-350 Processor
Atheros AR8152 PCI-E Fast Ethernet Controller (NDIS 6.20)
Atheros AR9285 Wireless Network Adapter

Judo@Judo-Lenovo-G475:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.04
DISTRIB_CODENAME=natty
DISTRIB_DESCRIPTION="Ubuntu 11.04"

When I EnableNetworking.It hangs on boot.
But when I DiableNetworking (Don't cross EnableNetworking) I can boot into the system.
But when I EnableNetworking. It hangs on boot.

Revision history for this message
Judo (963505-gmail) said : 		#3

More information for this problem.
Hardware
AMD E-350 Processor
Atheros AR8152 PCI-E Fast Ethernet Controller (NDIS 6.20)
Atheros AR9285 Wireless Network Adapter

Judo@Judo-Lenovo-G475:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.04
DISTRIB_CODENAME=natty
DISTRIB_DESCRIPTION="Ubuntu 11.04"

For the Next boot and I disconnect a lan wire.
When I DiableNetworking (Don't cross EnableNetworking) It can boot into the system.
But, when I EnableNetworking. It hangs on boot. I must connect a lan wire into my notebook first and power on.
         However when I remove a lan wire from my notebook it will show message "Disconnect-you are now offline" and go hang.

Revision history for this message
Judo (963505-gmail) said : 		#4

More information for this problem.
Hardware
AMD E-350 Processor
Atheros AR8152 PCI-E Fast Ethernet Controller (NDIS 6.20)
Atheros AR9285 Wireless Network Adapter

Judo@Judo-Lenovo-G475:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=11.04
DISTRIB_CODENAME=natty
DISTRIB_DESCRIPTION="Ubuntu 11.04"

For the Next boot and I disconnect a lan wire.
When I DisableNetworking (Don't cross EnableNetworking) It can boot into the system.
But, when I EnableNetworking. It hangs on boot. I must connect a lan wire into my notebook first and power on.
         However when I EnableNetworking it show message "Connect-Established" and I can use the Internet.
         When I DisableNetworking it will show message "Disconnect-you are now offline" and next I remove a lan wire from my notebookand it go hang.

         I install Windows7 to check about my hardware for this problem. It no problem when I plug and unplug a lan wire during I download information on the internet. It not hang.

        Now a day. When I want to shut down Ubuntu. I must Disable networking first. For next boot.( no lan wire connect)
And when I want to use the internet I must plug a lan wire first and EnableNetworking. When I finish to use my computer.
I must DisableNetworking first and shut down. And finally unplug a lan wire.

                                   Thank you.
                                    Judo Chiang Mai. Thailand.

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Launchpad Janitor (janitor) said : 		#5

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

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Mohammad AbuShady (coalwater) said : 		#6

hanging and not booting are two different problems, could you clarify which is your problem?