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Thread: Fresh install 12.04, no wired connection.

  1. #1
    Join Date
    Jun 2013
    Beans
    3

    Fresh install 12.04, no wired connection.

    I did a fresh install of 12.04, and the ethernet worked great while running it live from a USB. After installation to the HDD, however, I get nothing. No wired or wireless connection. The network manager is just empty. I found a lot of help threads with wired connection issues, but I didn't find one which covered this:

    ifconfig:
    Code:
    lo        Link encap:Local Loopback            inet addr:127.0.0.1  Mask:255.0.0.0
              inet6 addr: ::1/128 Scope:Host
              UP LOOPBACK RUNNING  MTU:16436  Metric:1
              RX packets:14976 errors:0 dropped:0 overruns:0 frame:0
              TX packets:14976 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:1226528 (1.2 MB)  TX bytes:1226528 (1.2 MB)
    There's no mention of eth0 at all.
    I'm new enough to linux that I'm not sure what that means for my system.

    The part of lshw that seemed relevent shows

    Code:
    *-network UNCLAIMED                description: Ethernet controller
                    product: BCM4401-B0 100Base-TX
                    vendor: Broadcom Corporation
                    physical id: 0
                    bus info: pci@0000:02:00.0
                    version: 02
                    width: 32 bits
                    clock: 33MHz
                    capabilities: pm bus_master cap_list
                    configuration: latency=64
                    resources: memory:efcfe000-efcfffff
    and lspci returns

    Code:
    00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
    00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
    00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01)
    00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01)
    00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 01)
    00:1d.0 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 01)
    00:1d.1 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 01)
    00:1d.2 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 01)
    00:1d.3 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 01)
    00:1d.7 USB controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 01)
    00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
    00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01)
    00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [IDE mode] (rev 01)
    00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 01)
    02:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)
    02:01.0 CardBus bridge: O2 Micro, Inc. Cardbus bridge (rev 21)
    02:01.4 FireWire (IEEE 1394): O2 Micro, Inc. Firewire (IEEE 1394) (rev 02)
    0c:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)
    /etc/network/interfaces has just two lines about lo, nothing about eth0.

    Any ideas why this could be happening?
    My wireless and wired are both down, but I'm primarily focused on getting ethernet working first.
    Last edited by sputnik2; June 19th, 2013 at 03:03 AM.

  2. #2
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    5,653
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: Fresh install 12.04, no wired connection.

    Hi,

    load the driver by hand:

    Code:
    sudo modprobe -v b44
    sudo service network-manager restart
    Check:
    Code:
    ifconfig -a
    cat /etc/resolv.conf

  3. #3
    Join Date
    Jun 2013
    Beans
    3

    Re: Fresh install 12.04, no wired connection.

    Thanks for the help! The modprobe command never completes, though. It leaves a process running until I Crl-C it.

  4. #4
    Join Date
    Jun 2013
    Beans
    3

    Re: Fresh install 12.04, no wired connection.

    However, I added b44 to /etc/modules instead and it worked when I rebooted! Thanks so much, it was that module I was missing.

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