I am running Ubuntu 12.04.4 with network interface:
*-network description: Wireless interface product: Centrino Advanced-N 6235 vendor: Intel Corporation physical id: 0 bus info: pci@0000:01:00.0 logical name: wlan0 version: 24 serial: c8:f7:33:8f:d3:9c width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=3.5.0-48-generic firmware=220.127.116.11 ip=18.104.22.168 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn resources: irq:43 memory:d0400000-d0401fff
I have been trying to set up an Ad-hoc network on my laptop for some time now. I have already established that it works pretty much always at home, but not at work (I figure because there are more networks here).
Today I figured I'd replace the existing driver with one from the manufacturer website, even though they seemed to be exactly the same. (
iwlwifi-6000g2b-6.ucode, version 22.214.171.124) Unfortunately I didn't back up the old one.
With the 'new' driver I was suddenly able to set up a Ad-hoc network again, using either NetworkManager (0.9.4.0-0ubuntu3):
* ipv6 ignore * 2.4 GHz (default) * ipv4 manual * WEP 40/128 bit key (Hex or ASCII) * MTU automatic
or commandline with
iwconfig commands (With NetworkManager shutdown).
iwconfig wlan0 key 1234567890 iwconfig wlan0 mode ad-hoc iwconfig wlan0 essid MyAdhoc ifconfig wlan0 192.168.1.1 netmask 255.255.255.0
But here's the kicker, it fails to work after the NetworkManager establishes another connection (Infrastructure, WPA2).
When it fails using the NetworkManager these lines repeatedly show up in
Apr 23 11:01:57 *** kernel: [ 2424.593393] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S Apr 23 11:01:57 *** kernel: [ 2424.600237] iwlwifi 0000:01:00.0: Radio type=0x2-0x1-0x0 Apr 23 11:01:57 *** kernel: [ 2424.720967] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
/var/log/syslog where I find the problem is with the wpa_supplicant:
Apr 29 17:13:39 *** wpa_supplicant: nl80211: Failed to set interface into IBSS mode Apr 29 17:13:39 *** wpa_supplicant: Association request to the driver failed
Trying manually then results in (response to
iwconfig wlan0 mode ad-hoc):
Error for wireless request "Set Mode" (8B06) : SET failed on device wlan0 ; Operation not supported.
I have tried disabling ipv6 as suggested here among others to no avail.
Then I tried editing the GRUB file as suggested here, which means booting with
ipv6.disable=1. After reboot, it does eliminate the third line but it does not result in an Adhoc network.
If I want to establish a new Ad-hoc network to reset the iwlwifi mod (And if I use the NetworkManager I have to be fast enough to ensure that it doesn't start on another network first).
sudo rmmod iwlwifi sudo modprobe iwlwifi
Does anyone have an idea what the problem could be and how to resolve it?