eth0 stopped working after changing hostname [SOLVED]

Clerik1 · 2010-12-06 18:08:42

As stated in the subject, my eth0 connection stopped working yesterday after I changed the hostname of my computer in /etc/rc.conf and /etc/hosts

I'm afraid that it may have affected my networking hardware somehow, as I no longer see any activity on the NIC or the router.

I only made changes in /etc/rc.conf and /etc/hosts, changing the hostname in rc.conf and adding my new hostname in hosts.

I've listed the relevant contents of rc.conf and hosts, and the output of ifconfig eth0, and lspci | grep net. I have already tried restarting network several times by invoking ./etc/rc.d/network restart.

Scanning through /var/log/everything.log, the following pattern seems to repeat itself after I changed the hostname for the first time:
Dec 5 19:33:17 Ajax kernel: r8169 0000:03:00.0: eth0: link down
Dec 5 19:33:17 Ajax kernel: r8169 0000:03:00.0: eth0: waiting for carrier

Does anyone have any suggestions as to how I might fix this? I find it hard to believe that my NIC would just die on the spot like that.

</etc/rc.conf>
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# NETWORKING
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
...
HOSTNAME="myhost"
...
eth0="dhcp"
INTERFACES=(eth0)
</rc.conf>

</etc/hosts>
...
127.0.0.1 localhost.localdomain localhost
...
</hosts>

<# ifconfig eth0>
eth0 Link encap: Ethernet HWaddr ##:##:##:##:##:##
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:45 Base address: 0xc000

</#ifconfig eth0>

<# lspci | grep net>
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
</# lspci | grep net>

Last edited by Clerik1 (2010-12-07 02:57:10)

perbh · 2010-12-06 18:14:38

Are you using wicd or network manager?
Are you using static or dynamic ip-address?

Clerik1 · 2010-12-06 18:20:03

@perbh

I haven't installed wicd or networkmanager
# which wicd
no wicd in (/bin:/usr/bin:/sbin:/usr/sbin:/usr/bin/perlbin/vendor:/usr/lib/perl5/core_perl/bin)

# which networkmanager
no network-manager in (/bin:/usr/bin:/sbin:/usr/sbin:/usr/bin/perlbin/vendor:/usr/lib/perl5/core_perl/bin)

I am using a dynamic ip-address assigned by my router (192.168.1.1*)

perbh · 2010-12-06 18:31:17

my mistake - didn't think you would take me literally :-(
try 'which NetworkManager'

Clerik1 · 2010-12-06 18:33:48

@perbh

# which NetworkManager
no NetworkManager in (/bin:/usr/bin:/sbin:/usr/sbin:/usr/bin/perlbin/vendor:/usr/lib/perl5/core_perl/bin)

.:B:. · 2010-12-06 18:37:19

What errors does your DHCP client (e.g. dhcpcd) throw when you try to obtain an address? Can you ping localhost?

skunktrader · 2010-12-06 18:42:33

I don't see myhost in /etc/hosts

Clerik1 · 2010-12-06 18:45:57

@ .:B:.
ping 127.0.0.1
64 bytes from 127.0.0.1 : icmp_seq=1 ttl=64 time=0.014 ms
64 bytes from 127.0.0.1 : icmp_seq=1 ttl=64 time=0.006 ms
64 bytes from 127.0.0.1 : icmp_seq=1 ttl=64 time=0.014 ms
^C
- - - 127.0.0.1 ping statistics - - -
3 packets transmitted, 3 received, 0% packet loss, time 1998ms

`./etc/rc.d/network restart` generates the following messages in everything.log:
Dec 6 11:43:08 myhost kernel: r8169 0000:03:00.0: eth0: link down
Dec 6 11:43:08 myhost kernel: ADDRCONF(NETDEV_UP): eth0: link is not ready
Dec 6 11:43:08 myhost dhcpcd[2585]: eth0: waiting for carrier

Last edited by Clerik1 (2010-12-06 18:52:00)

Clerik1 · 2010-12-06 18:48:30

@skunktrader

</etc/hosts>
...
127.0.0.1 localhost.localdomain localhost myhost
...
</hosts>

I just made this change. Am I missing something?

.:B:. · 2010-12-07 01:39:10

Did you check whether your network cable is properly connected? On both sides?

And please use [ code ] tags to post the contents of your files or the output of commands. That immensely improves readability.

Clerik1 · 2010-12-07 02:56:15

I figured it out!

I disconnected power for ~30 minutes and removed the cmos battery to reset the bios.

Thanks for the input everyone, and sorry if my posts were unreadable.

Arch Linux

#1 2010-12-06 18:08:42

eth0 stopped working after changing hostname [SOLVED]

#2 2010-12-06 18:14:38

Re: eth0 stopped working after changing hostname [SOLVED]

#3 2010-12-06 18:20:03

Re: eth0 stopped working after changing hostname [SOLVED]

#4 2010-12-06 18:31:17

Re: eth0 stopped working after changing hostname [SOLVED]

#5 2010-12-06 18:33:48

Re: eth0 stopped working after changing hostname [SOLVED]

#6 2010-12-06 18:37:19

Re: eth0 stopped working after changing hostname [SOLVED]

#7 2010-12-06 18:42:33

Re: eth0 stopped working after changing hostname [SOLVED]

#8 2010-12-06 18:45:57

Re: eth0 stopped working after changing hostname [SOLVED]

#9 2010-12-06 18:48:30

Re: eth0 stopped working after changing hostname [SOLVED]

#10 2010-12-07 01:39:10

Re: eth0 stopped working after changing hostname [SOLVED]

#11 2010-12-07 02:56:15

Re: eth0 stopped working after changing hostname [SOLVED]

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