I have set-up a bridge (br0) on eth0 of my laptop, as I'm using KVM from time to time.
This is the content of /etc/network/interfaces:
aaa@xxx:~$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
#
auto eth0
iface eth0 inet manual
auto br0
iface br0 inet dhcp
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
My problem is, if I boot WITHOUT a live connection plugged into the ethernet port of my laptop, NetworkManager sees my WiFi as "disabled by a hardware switch". As such, I can't use WiFi when there's no LAN. I can use WiFi when there's a LAN connection present, but it defeats the purpose of having a WiFi connection.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
Uname: Linux 3.2.0-27-generic x86_64
NonfreeKernelModules: wl fglrx
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
CRDA: Error: [Errno 2] No such file or directory
Date: Wed Aug 8 13:35:08 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
IpRoute:
default via 192.200.2.252 dev br0
10.88.88.0/21 dev br0 proto kernel scope link src 10.88.93.229
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1
192.200.2.0/24 dev br0 proto kernel scope link src 192.200.2.8
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
ProcEnviron:
LANGUAGE=en_PH:en
TERM=xterm
PATH=(custom, no user)
LANG=en_PH.UTF-8
SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2012-06-28T15:41:09.106173
nmcli-con:
NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY DBUS-PATH
Moldex.Group fa0e4888-b65b-4bf8-b559-d50a8d6144df 802-11-wireless 0 never yes no /org/freedesktop/NetworkManager/Settings/2
SMVT 147d6502-8b9e-4730-8015-ac2583d7b8f4 802-11-wireless 1343604463 Monday, 30 July, 2012 07:27:43 AM PHT yes no /org/freedesktop/NetworkManager/Settings/1
Wired connection 1 9550c743-1ea4-4c2b-84dd-ff3800765cea 802-3-ethernet 1340869202 Thursday, 28 June, 2012 03:40:02 PM PHT no no /org/freedesktop/NetworkManager/Settings/0
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
eth0 802-3-ethernet unmanaged /org/freedesktop/NetworkManager/Devices/1
eth1 802-11-wireless disconnected /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
running 0.9.4.0 connected enabled enabled enabled enabled disabled
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC270 Analog [ALC270 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: tinsaymc 2512 F.... pulseaudio
/dev/snd/controlC0: tinsaymc 2512 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xd4100000 irq 44'
Mixer name : 'Realtek ALC270'
Components : 'HDA:10ec0270,103c1426,00100100'
Controls : 20
Simple ctrls : 11
Card1.Amixer.info:
Card hw:1 'Generic'/'HD-Audio Generic at 0xd4020000 irq 45'
Mixer name : 'ATI R6xx HDMI'
Components : 'HDA:1002aa01,00aa0100,00100200'
Controls : 6
Simple ctrls : 1
Card1.Amixer.values:
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MachineType: Hewlett-Packard HP G42 Notebook PC
NonfreeKernelModules: wl fglrx
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_PH:en
TERM=xterm
PATH=(custom, no user)
LANG=en_PH.UTF-8
SHELL=/bin/bash
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-27-generic root=/dev/mapper/IT--035687-root ro quiet
ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
RelatedPackageVersions:
linux-restricted-modules-3.2.0-27-generic N/A
linux-backports-modules-3.2.0-27-generic N/A
linux-firmware 1.79
StagingDrivers: mei
Tags: precise running-unity staging
Uname: Linux 3.2.0-27-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
dmi.bios.date: 08/18/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.24
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1426
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 54.46
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.24:bd08/18/2010:svnHewlett-Packard:pnHPG42NotebookPC:pvr059D120000002710010000000:rvnHewlett-Packard:rn1426:rvr54.46:cvnHewlett-Packard:ct10:cvrN/A:
dmi.product.name: HP G42 Notebook PC
dmi.product.version: 059D120000002710010000000
dmi.sys.vendor: Hewlett-Packard
Sounds like a driver problem