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Thread: Wifi not working despite having installed drivers

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    Join Date
    Jun 2012
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    Post Wifi not working despite having installed drivers

    Excuse me if this question seems naive - I'm fairly new to ubuntu. So, until two days ago, my wifi was working perfect. Then, I ran the update manager - and it downloaded updates using the working wifi - and after a restart, the computer stopped detecting wireless networks - which I know are there because they work fine in windows. So, I searched the net and fount this. I installed the drives as the page said. And everything was fine again. My laptop gets very hot sometimes - so I edited the grub file to allow ASPM. Then again I restart - and wifi doesn't recognize networks. I am really tired of this. So please help.
    Here's the output of ~$ lspci

    Code:
    00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 12)
    00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 12)
    00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
    00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06)
    00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 06)
    00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 06)
    00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 06)
    00:1c.2 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 3 (rev 06)
    00:1c.4 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 5 (rev 06)
    00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06)
    00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a6)
    00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 06)
    00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 06)
    00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 06)
    01:00.0 VGA compatible controller: ATI Technologies Inc Manhattan [Mobility Radeon HD 5400 Series]
    01:00.1 Audio device: ATI Technologies Inc Manhattan HDMI Audio [Mobility Radeon HD 5000 Series]
    12:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01)
    13:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
    ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
    ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
    ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
    ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
    ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
    ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
    prasoon@bk201:~$ lspci
    00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 12)
    00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 12)
    00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
    00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06)
    00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 06)
    00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 06)
    00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 06)
    00:1c.2 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 3 (rev 06)
    00:1c.4 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 5 (rev 06)
    00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06)
    00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a6)
    00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 06)
    00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 06)
    00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 06)
    01:00.0 VGA compatible controller: ATI Technologies Inc Manhattan [Mobility Radeon HD 5400 Series]
    01:00.1 Audio device: ATI Technologies Inc Manhattan HDMI Audio [Mobility Radeon HD 5000 Series]
    12:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01)
    13:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
    ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
    ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
    ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
    ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
    ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
    ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
    And here's what ~$ iwconfig says:
    Code:
    lo        no wireless extensions.
    
    eth0      no wireless extensions.
    
    wlan0     IEEE 802.11bgn  ESSID:off/any  
              Mode:Managed  Access Point: Not-Associated   Tx-Power=19 dBm   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
              Power Management:off
              
    usbpn0    no wireless extensions.
    
    ppp0      no wireless extensions.
    Also, 'additional drivers' says that the driver is active and currently in use. See attachment.
    Attached Images Attached Images

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