Hi i am requesting help for my problem with Wifi on my notebook Lenovo E420. I just cant get it working 
Here are some terminal outputs:
lspci
Code:
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation 2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 6 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 1 (rev b4)
00:1c.1 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 2 (rev b4)
00:1c.2 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 3 (rev b4)
00:1c.3 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 4 (rev b4)
00:1c.7 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 8 (rev b4)
00:1d.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 6 Series Chipset Family 6 port SATA AHCI Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 6 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: ATI Technologies Inc NI Whistler [AMD Radeon HD 6600M Series]
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
04:00.0 System peripheral: Ricoh Co Ltd Device e823 (rev 04)
09:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000
madik@madik-ThinkPad-E420:~$ lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation 2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 6 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 1 (rev b4)
00:1c.1 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 2 (rev b4)
00:1c.2 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 3 (rev b4)
00:1c.3 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 4 (rev b4)
00:1c.7 PCI bridge: Intel Corporation 6 Series Chipset Family PCI Express Root Port 8 (rev b4)
00:1d.0 USB Controller: Intel Corporation 6 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 6 Series Chipset Family 6 port SATA AHCI Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 6 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: ATI Technologies Inc NI Whistler [AMD Radeon HD 6600M Series]
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
04:00.0 System peripheral: Ricoh Co Ltd Device e823 (rev 04)
09:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000
lsusb
Code:
Bus 002 Device 006: ID 0a5c:217f Broadcom Corp. Bluetooth Controller
Bus 002 Device 003: ID 147e:1002 Upek
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 04f2:b257 Chicony Electronics Co., Ltd
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
iwconfig
Code:
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=off
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
lsmod
Code:
Module Size Used by
hidp 22572 1
hid 91020 1 hidp
iptable_filter 12810 1
ip_tables 27456 1 iptable_filter
x_tables 29581 2 iptable_filter,ip_tables
parport_pc 36959 0
ppdev 17113 0
snd_hda_codec_hdmi 28103 1
snd_hda_codec_conexant 57511 1
joydev 17606 0
binfmt_misc 17565 1
rfcomm 47694 8
sco 18131 2
bnep 18308 2
l2cap 53570 21 hidp,rfcomm,bnep
arc4 12529 2
snd_hda_intel 33211 2
snd_hda_codec 103804 3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
snd_hwdep 13604 1 snd_hda_codec
snd_pcm 96625 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
thinkpad_acpi 81587 0
iwlagn 333500 0
snd_seq_midi 13324 0
snd_rawmidi 30486 1 snd_seq_midi
snd_seq_midi_event 14899 1 snd_seq_midi
snd_seq 61621 2 snd_seq_midi,snd_seq_midi_event
snd_timer 29602 2 snd_pcm,snd_seq
btusb 18600 4
acer_wmi 23771 0
iwlcore 167503 1 iwlagn
mac80211 294370 2 iwlagn,iwlcore
snd_seq_device 14462 3 snd_seq_midi,snd_rawmidi,snd_seq
sparse_keymap 13898 1 acer_wmi
bluetooth 72448 10 hidp,rfcomm,sco,bnep,l2cap,btusb
i915 514985 2
uvcvideo 72195 0
psmouse 73535 0
snd 67382 15 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,thinkpad_acpi,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
fglrx 2739144 0
cfg80211 178528 3 iwlagn,iwlcore,mac80211
videodev 82052 1 uvcvideo
serio_raw 13166 0
v4l2_compat_ioctl32 17078 1 videodev
drm_kms_helper 42136 1 i915
snd_page_alloc 18529 2 snd_hda_intel,snd_pcm
drm 227495 3 i915,drm_kms_helper
i2c_algo_bit 13400 1 i915
video 19438 1 i915
soundcore 12680 1 snd
nvram 14419 1 thinkpad_acpi
lp 17825 0
parport 46458 3 parport_pc,ppdev,lp
ahci 25951 2
r8169 48022 0
libahci 26642 1 ahci
sdhci_pci 13989 0
sdhci 27387 1 sdhci_pci
sudo lshw -C network
Code:
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 06
serial: f0:de:f1:54:a1:6e
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=192.168.1.148 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
resources: irq:41 ioport:4000(size=256) memory:e0404000-e0404fff memory:e0400000-e0403fff
*-network DISABLED
description: Wireless interface
product: Centrino Wireless-N 1000
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:09:00.0
logical name: wlan0
version: 00
serial: 8c:a9:82:6d:39:f0
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlagn driverversion=2.6.38-8-generic firmware=128.50.3.1 build 13488 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:44 memory:e1d00000-e1d01fff
rfkill list
Code:
1: phy0: Wireless LAN
Soft blocked: yes
Hard blocked: no
2: acer-wireless: Wireless LAN
Soft blocked: yes
Hard blocked: no
3: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
5: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
I would appreciate any help with my Wifi issue. thanks