After I installed Ubuntu 11.10. I tried bridging eth0 and wlan0 with this script:
#####################################
#!/bin/bash
service network-manager stop
ifconfig eth0 0.0.0.0
ifconfig eth0 up
ifconfig wlan0 0.0.0.0
ifconfig wlan0 up
brctl addbr br0
hostapd -dd /etc/hostapd/hostapd.conf > /var/log/hostapd.log &
sleep 5
brctl addif br0 eth0
brctl addif br0 wlan0
ifconfig br0 192.168.1.15 netmask 255.255.255.0
ifconfig br0 up
route add default gw 192.168.1.1
#########################
And it showed up this error:
l2_packet_receive - recvfrom: Network is down
device wlan0 is already a member of a bridge; can't enslave it to bridge br0.
I have used same scripts on earlier Ubuntu versions; but there was no such error.
Apart from that error, after enabling the bridge, the moment another device tried to connect to it, the system freezes. I ran same script by logging to CLI (alt + f5), then when the freeze happens, error message kept on scrolling on screen (so fast that I could not read anything).
I tried loading 2.6.38 kernel, then also the first mentioned errors showed up, but system did not freeze and the bridge (access point mode) worked fine.
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 1.23-0ubuntu3
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ashwin 1563 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf7cf8000 irq 45'
Mixer name : 'Realtek ALC269'
Components : 'HDA:10ec0269,10438442,00100004'
Controls : 9
Simple ctrls : 5
DistroRelease: Ubuntu 11.10
HibernationDevice: RESUME=UUID=d3930f52-5879-4184-ae59-7d0712e31d29
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
MachineType: ASUSTeK Computer INC. 1005PX
Package: linux (not installed)
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=UUID=2ddb9538-ee18-40ec-ae85-2f28759a7486 ro quiet splash pcie_aspm=force vt.handoff=7
ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
RelatedPackageVersions:
linux-restricted-modules-2.6.38-11-generic N/A
linux-backports-modules-2.6.38-11-generic N/A
linux-firmware 1.60
StagingDrivers: zram
Tags: oneiric running-unity staging
Uname: Linux 2.6.38-11-generic i686
UpgradeStatus: Upgraded to oneiric on 2011-10-15 (4 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 04/30/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0601
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1001PX
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0601:bd04/30/2010:svnASUSTeKComputerINC.:pn1005PX:pvrx.x:rvnASUSTeKComputerINC.:rn1001PX:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: 1005PX
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 875503
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.