Can't turn on or enable wireless

Question

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

and

# 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=192.168.2.3 link=yes multicast=yes

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

Solution

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

Comments

[Alvar]

is your hardware switch on? askubuntu.com/q/44863/10698

[Moein Hosseini]

yes,and It works correctly in Windows

[gertvdijk]

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.

[Admin]

This is demonstrably false. Windows can only use hardware when Windows is booted. When Ubuntu (or any other operating system) is booted on bare metal, only that OS has access to the hardware.

[Pilot6]

This may be a correct solution with Win 10.