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Thread: wlan0 not showing up

  1. #1
    Join Date
    May 2012
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    wlan0 not showing up

    Hey guys!
    Fairly new to linux so bear with me but I appreciate any help

    I have ubuntu 12.04 installed next to windows 7 and I recently had to change my internal wireless cards from ralink to atheros and easily installed the drivers on windows but on ubuntu it seemed like WLAN0 disappeares both in ipconfig and iwconfig. I know its because the old card was never uninstalled and when I checked /etc/udev/rules.d/70persistent-net.rules wlan0 is mentioned in the same line with my old wireless card whatever that means haha.

  2. #2
    Join Date
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    Re: wlan0 not showing up

    Post the result of

    Code:
    lspci -nnk
    Ubuntu Member Always something different. Promoting Ubuntu and System 76 at TUXPC

  3. #3
    Join Date
    May 2012
    Beans
    8

    Re: wlan0 not showing up

    $ lspci -nnk
    00:00.0 Host bridge [0600]: Advanced Micro Devices [AMD] Family 14h Processor Root Complex [1022:1510]
    Subsystem: Lenovo Device [17aa:397b]
    00:01.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Wrestler [Radeon HD 6320] [1002:9806]
    Subsystem: Lenovo Device [17aa:397b]
    Kernel driver in use: radeon
    Kernel modules: radeon
    00:01.1 Audio device [0403]: Advanced Micro Devices [AMD] nee ATI Wrestler HDMI Audio [Radeon HD 6250/6310] [1002:1314]
    Subsystem: Lenovo Device [17aa:397b]
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd-hda-intel
    00:11.0 SATA controller [0106]: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] [1002:4391]
    Subsystem: Lenovo Device [17aa:397b]
    Kernel driver in use: ahci
    00:12.0 USB controller [0c03]: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
    Subsystem: Lenovo Device [17aa:397b]
    Kernel driver in use: ohci_hcd
    00:12.2 USB controller [0c03]: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
    Subsystem: Lenovo Device [17aa:397b]
    Kernel driver in use: ehci_hcd
    00:13.0 USB controller [0c03]: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
    Subsystem: Lenovo Device [17aa:397b]
    Kernel driver in use: ohci_hcd
    00:13.2 USB controller [0c03]: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
    Subsystem: Lenovo Device [17aa:397b]
    Kernel driver in use: ehci_hcd
    00:14.0 SMBus [0c05]: Advanced Micro Devices [AMD] nee ATI SBx00 SMBus Controller [1002:4385] (rev 42)
    Subsystem: Lenovo Device [17aa:397b]
    Kernel modules: sp5100_tco, i2c-piix4
    00:14.2 Audio device [0403]: Advanced Micro Devices [AMD] nee ATI SBx00 Azalia (Intel HDA) [1002:4383] (rev 40)
    Subsystem: Lenovo Device [17aa:397b]
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd-hda-intel
    00:14.3 ISA bridge [0601]: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 LPC host controller [1002:439d] (rev 40)
    Subsystem: Lenovo Device [17aa:397b]
    00:14.4 PCI bridge [0604]: Advanced Micro Devices [AMD] nee ATI SBx00 PCI to PCI Bridge [1002:4384] (rev 40)
    00:14.5 USB controller [0c03]: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI2 Controller [1002:4399]
    Subsystem: Lenovo Device [17aa:397b]
    Kernel driver in use: ohci_hcd
    00:15.0 PCI bridge [0604]: Advanced Micro Devices [AMD] nee ATI SB700/SB800/SB900 PCI to PCI bridge (PCIE port 0) [1002:43a0]
    Kernel driver in use: pcieport
    Kernel modules: shpchp
    00:15.2 PCI bridge [0604]: Advanced Micro Devices [AMD] nee ATI SB900 PCI to PCI bridge (PCIE port 2) [1002:43a2]
    Kernel driver in use: pcieport
    Kernel modules: shpchp
    00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 0 [1022:1700] (rev 43)
    00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 1 [1022:1701]
    00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 2 [1022:1702]
    00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 3 [1022:1703]
    Kernel driver in use: k10temp
    Kernel modules: k10temp
    00:18.4 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 4 [1022:1704]
    00:18.5 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 6 [1022:1718]
    00:18.6 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 5 [1022:1716]
    00:18.7 Host bridge [0600]: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 7 [1022:1719]
    02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 06)
    Subsystem: Lenovo Device [17aa:3975]
    Kernel driver in use: r8169
    Kernel modules: r8169
    03:00.0 Network controller [0280]: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
    Subsystem: Foxconn International, Inc. T77H126.00 802.11bgn Wireless Half-size Mini PCIe Card [105b:e017]
    Kernel modules: ath9k

  4. #4
    Join Date
    Apr 2009
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    Ubuntu 14.04 Trusty Tahr

    Re: wlan0 not showing up

    This is your device
    Code:
    03:00.0 Network controller [0280]: Atheros Communications Inc. AR9285  Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
    	Subsystem: Foxconn International, Inc. T77H126.00 802.11bgn Wireless Half-size Mini PCIe Card [105b:e017]
    	Kernel modules: ath9k
    And it looks OK, the driver is in place.

    Install rfkill and do:

    Code:
    rfkill list all
    does it report any locking?
    Ubuntu Member Always something different. Promoting Ubuntu and System 76 at TUXPC

  5. #5
    Join Date
    May 2012
    Beans
    8

    Re: wlan0 not showing up

    It does not, no.

  6. #6
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    6,510
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: wlan0 not showing up

    The driver is not in use:

    Code:
    sudo modprobe ath9k
    should do the trick.

    Check:

    Code:
    grep ath /etc/modprobe.d/*
    lsmod
    iwconfig
    rfkill list
    Setup a new "70-"file:
    Code:
    sudo mv /etc/udev/rules.d/70-persistent-net.rules /etc/udev/rules.d/70-persistent-net.bak
    sudo udevadm trigger
    sudo service udev reload

  7. #7
    Join Date
    May 2012
    Beans
    8

    Re: wlan0 not showing up

    Hm when doing sudo modprobe ath9k it gives:
    WARNING: error inserting ath9k_hw (/lib/.../ath9k_hw.ko): invalid argument
    Same for ath9k_common, mac80211 and
    FATAL: error inserting ath9k ... Invalid argument

  8. #8
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    6,510
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: wlan0 not showing up

    Try

    echo ath9k | sudo tee -a /etc/modules
    and reboot.

  9. #9
    Join Date
    May 2012
    Beans
    8

    Re: wlan0 not showing up

    Is this supposed to take a long time? After putting in the command it just gives me a cursor without any text ?

  10. #10
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    6,510
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: wlan0 not showing up

    Check
    cat /etc/modules
    If "ath9k" shows up, reboot. Check after that:
    Code:
    lsmod
    iwconfig
    dmesg | grep ath

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