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I have been using ubuntu for a few years now, and since I upgraded from 12.10 to 13.04 I have this issue, where I get no error or notifications at all, but my wired connection just stops working. The connection stops working when I open a webbrowser, use terminal to update or whatever I am doing. The only thing that doesn't let the connection being dropped seems to be dropbox and skype.

I noticed some changes in my /etc/resolv.conf file. Which contains this line when the connection is still working:


And contains this line after it stops working:

search lan

Changing anything in this file doesn't seem to work, neither does sudo service network-manager restart do anything usefull.

I collected some data here:

lspci -nnk | grep -iA2 eth

02:00.0 Ethernet controller [0200]: Qualcomm Atheros AR8151 v2.0 Gigabit Ethernet [1969:1083] (rev c0)
Subsystem: Acer Incorporated [ALI] Device [1025:050e]
Kernel driver in use: atl1c

sudo lshw -C network

description: Ethernet interface
product: AR8151 v2.0 Gigabit Ethernet
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: c0
serial: b8:70:f4:6d:78:cc
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion= duplex=full ip= latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:53 memory:c0200000-c023ffff ioport:2000(size=128)
description: Wireless interface
product: BCM43227 802.11b/g/n
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth1
version: 00
serial: c0:f8:da:54:15:0d
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion= (r326264) ip= latency=0 multicast=yes wireless=IEEE 802.11abg
resources: irq:17 memory:c0100000-c0103fff

cat /etc/network/interfaces

(#) interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

The () around the # are only there to not let the site turn it into caps(the text, it is a markup thingy).

I also read about this bug: Link And was told to quote out dns=dnsmasq in /etc/NetworkManager/NetworkManager.conf and restart network manager.

This all didn't work. Does anyone please have an answer? Thanks in advance.

share|improve this question
up vote 1 down vote accepted

The problem might be due to the incompatibility of the built-in driver in Ubuntu 13.04 release.

  1. Download compat-drivers source code:

  2. Extract the tarball and type the following commands on a terminal:

cd [path-to-extracted-driver]

./scripts/driver-select alx


sudo make install

  1. Reboot the system.
share|improve this answer
That seems to fix the problem, thanks mate! – Dr_Bunsen Jul 8 '13 at 7:39
No problem at all :) – Maduka Jayalath Jul 8 '13 at 7:46
Hmm... when I want to connect to a wireless connection it crashes(again).... I guess no wired connection and wired at the same time. (I use a vm which connects through wireless to a different network). – Dr_Bunsen Jul 8 '13 at 8:05

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