network interface names changed from eth0 to eth1

Bug #35576 reported by Keywan Tonekaboni on 2006-03-19
Affects Status Importance Assigned to Milestone
udev (Ubuntu)

Bug Description

I didn't changed the hardware (it's an ibook), but the since I updated from breezy to dapper the names of the interfaces changed and eth0 is empty.

My ethernet card (sungem) moved from eth0 to eth1 and my wlan-card (bcm43xx) moved from eth1 to eth2.

I have this problem also with a self-built kernel (2.6.15), which works fine with breezy. Maybe this isn't a kernel problem, but I have no idea where to fill this bug better.

x (xk2c-deactivatedaccount) wrote :

same here. I have i386.

I think the problem is that /etc/iftab has the wrong Mac-Adress. It was auto generated during dist-upgrade from breezy here.

$ cat /etc/iftab
# This file assigns persistent names to network interfaces. See iftab(5).
eth0 mac 00:80:c8:fa:e1:18

$ ifconfig
eth1 Protokoll:Ethernet Hardware Adresse 00:0B:6A:BB:8E:ED

These Mac Adresses do not match.
I will now test if it works, when they are the same.

x (xk2c-deactivatedaccount) wrote :

After entering the right Mac adress in /etc/iftab it works.

$ ifconfig
eth0 Protokoll:Ethernet Hardware Adresse 00:0B:6A:BB:8E:ED

Changed in linux-image-2.6.15-18-powerpc:
status: Unconfirmed → Confirmed
x (xk2c-deactivatedaccount) wrote :

I have talked with Keywan Najafi Tonekaboni offlist.

We both used:
$ locale
> LANG=de_DE.UTF-8
> LC_CTYPE="de_DE.UTF-8"
> LC_TIME="de_DE.UTF-8"
> LC_PAPER="de_DE.UTF-8"
> LC_NAME="de_DE.UTF-8"


> $ cat /etc/environment
> LANGUAGE="de_DE:de:en_GB:en"
> LANG=de_DE.UTF-8

It might possible, that the install-script which should put the MAC-address in /etc/iftab fails with this locale settings, because:

$ ifconfig
eth0 Protokoll:Ethernet Hardware Adresse 00:0B:6A:BB:8E:ED

$ LANG=C ifconfig
eth0 Link encap:Ethernet HWaddr 00:0B:6A:BB:8E:ED

When the script "greps" the MAC from this output, it could break with User-locale settings.

Anyone who can confirm this?

x (xk2c-deactivatedaccount) wrote :

# LANG=C dpkg -l /etc/iftab
No packages found matching /etc/iftab.

Does this mean /etc/iftab is obsolete in Dapper?

x (xk2c-deactivatedaccount) wrote :


That should have been:

dpkg -S iftab
udev: /usr/share/man/man8/iftab_helper.8.gz
udev: /lib/udev/iftab_helper
udev: /usr/share/man/man5/iftab.5.gz
udev: /etc/udev/rules.d/25-iftab.rules

/etc/iftab must be maintained by hand at the moment

Changed in udev:
status: Confirmed → Rejected
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