Public bug reported:
After a fresh installation, I can't drive my wireless card, Intel Centrino
Wireless-N 1000.
The problem is about the firmware used in LTS 12.04.
First I'm very sure that both my hardware switch and soft switch are on.
[code]
nico@jacob-pc:~$ rfkill list all
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
5: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
nico@jacob-pc:~$
[/code]
Then when running 'iwconfig' command, I got this
[code]
nico@jacob-pc:~$ iwconfig
eth0 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=0 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
[/code]
This means the system can probe my card, but can't drive it.
Third, I used 'iwlist scan' command, 'ifup wlan0' command and 'dhclient wlan0'
command, there are the outputs:
[code]
nico@jacob-pc:~$ iwlist scan
eth0 Interface doesn't support scanning.
lo Interface doesn't support scanning.
wlan0 Failed to read scan data : Network is down
nico@jacob-pc:~$ sudo ifup wlan0
[sudo] password for nico:
Ignoring unknown interface wlan0=wlan0.
nico@jacob-pc:~$ sudo dhclient wlan0
RTNETLINK answers: Input/output error
^C
[/code]
This means the system can't drive my card, there may be something wrong with
the firmware.
After a long time trying, I found a way to solve this problem at last.
Download a older firmware from
http://wireless.kernel.org/en/users/Drivers/iwlwifi?action=AttachFile&do=get&target=iwlwifi-1000-ucode-128.50.3.1.tgz
This firmware is only for kernel 2.6.30+, the original one is for 3.2+. LTS
12.04 use a latest one from that website,
that's the reason. So just delete or rename the original one which is named
iwlwifi-1000-5.ucode,
and put iwlwifi-1000-3.ucode from that tarball to /lib/firmware, and run
'modprobe -r iwlwifi',
'modprobe iwlwifi', everything will be wonderful.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-firmware 1.79.1
ProcVersionSignature: Ubuntu 3.2.0-39.62-generic 3.2.39
Uname: Linux 3.2.0-39-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.2
Architecture: amd64
Date: Mon Apr 22 10:24:08 2013
Dependencies:
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64
(20120823.1)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: linux-firmware
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-firmware (Ubuntu)
Importance: Undecided
Assignee: Jacob_81 (angelerosster)
Status: New
** Tags: 1000 amd64 centrino intel precise wireless-n
** Attachment added: "outputs about dmesg | grep wlan & dmesg | grep iwl"
https://bugs.launchpad.net/bugs/1171285/+attachment/3650195/+files/Outputs_about_dmesg_grep_wlan%26iwl
** Changed in: linux-firmware (Ubuntu)
Assignee: (unassigned) => Jacob_81 (angelerosster)
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https://bugs.launchpad.net/bugs/1171285
Title:
intel centrino Wireless-N 1000 firmware is wrong under LTS 12.04
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