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Accepted
samarasa
Asked: 2011-11-05 13:39:41 +0800 CST

Network connection problems on Ubuntu 10.04 LTS server?

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I am running Ubuntu 10.04 LTS on a Dell PowerEdge T410 and using a wired network connection. Whenever system becomes idle, it looses network connection.

I needed to either logout or restart the machine in order to make network connections work. However, I have another Dell server running 10.04 LTS and it is working fine.

$ lspci 
... ...
01:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5716 Gigabit Ethernet (rev 20)
01:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5716 Gigabit Ethernet (rev 20)
... ...

$ uname -a
Linux ubuntu-user 2.6.32-34-server #77-Ubuntu SMP Tue Sep 13 20:54:38 UTC 2011 x86_64 GNU/Linux

 $ tail -300 /var/log/kern.log | grep "Nov  4"
Nov  4 12:36:34 ubuntu-user kernel: [161497.534069] npviewer.bin[17951]: segfault at eeb740a4 ip 00000000f5d74c83 sp 00000000ff8d4ed0 error 4 in libflashplayer.so[f58f7000+fc7000]

$ tail -10 /var/log/pm-powersave.log
/usr/lib/pm-utils/power.d/powersave-policy-hda-powerdown false:success.
/usr/lib/pm-utils/power.d/sched-powersave false:**sched policy powersave OFF
success.
/usr/lib/pm-utils/power.d/95hdparm-apm true:success.
/usr/lib/pm-utils/power.d/anacron true:stop: Unknown instance: 
success.
/usr/lib/pm-utils/power.d/powersave-policy-dirty-writeback true:success.
/usr/lib/pm-utils/power.d/powersave-policy-hda-powerdown true:success.
/usr/lib/pm-utils/power.d/sched-powersave true:**sched policy powersave ON
success.

What is the problem and how can I solve it?

10.04

1 Answers

  1. Best Answer

    I'll assume that "system becomes idle" means "screensaver activated" or "lid closed", and suggest that the Power Manager is your culprit. Look at /var/log/pm-*.log and man pm-powersave

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