Public bug reported:
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.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: brctl compat-wireless hostapd
** Tags added: brctl compat-wireless hostapd
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https://bugs.launchpad.net/bugs/875503
Title:
Ath9k driver causes kernel panic and system freeze on Ubuntu 11.10
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