I'm using ubuntu 11.10 for a couple of months.

but Today after restart my laptop I can't get wireless on. I tried to install windows wireless drivers but it didn't work too.

and It's not off by rfkill too.

# rfkill list all
0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
1: dell-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no
2: dell-bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no

when I tried

# ifconfig wlan0 up
wlan0: ERROR while getting interface flags: No such device
# lshw -C network  *-network
description: Ethernet interface product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:05:00.0 logical name: eth0 version: 05 serial: 78:2b:cb:e6:7a:ca size: 10Mbit/s capacity: 100Mbit/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 autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8105e-1.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s resources: irq:46 ioport:d000(size=256) memory:f3204000-f3204fff memory:f3200000-f3203fff *-network UNCLAIMED description: Network controller product: Centrino Wireless-N 1030 vendor: Intel Corporation physical id: 0 bus info: pci@0000:09:00.0 version: 34 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress cap_list configuration: latency=0 resources: memory:f7a00000-f7a01fff *-network description: Ethernet interface physical id: 2 logical name: eth2 serial: 00:1f:1f:96:af:41 capabilities: ethernet physical configuration: broadcast=yes driver=cdc_ether driverversion=22-Aug-2005 firmware=CDC Ethernet Device ip= link=yes multicast=yes

Now where is the problem and How should I solve it?


This might help you. Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command below.

sudo apt-get install linux-backports-modules-wireless-oneiric-generic
sudo reboot
  • For Ubuntu precise this would be installing linux-backports-modules-cw-x.y-precise-generic (where x.y is e.g. 3.6) to get backported wireless modules for the regular Ubuntu kernel. – gertvdijk Dec 31 '12 at 0:42

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