Ubuntu: wlan0 not found after installing ath9k from backport - ubuntu 14.04


I tried installing ath9k from backports looking here for tp-rink wn722nc.

After doing everything I rebooted my computer, but now I don't have wlan0. my internel wifi card is bcm43142 802.11 b/g/n. It's like here.

I had wifi connection before installing ath9k.

modprobe wl:

   modprobe: ERROR: could not insert 'wl': Invalid argument)  

lshw -c net :

  *-network                          description: Ethernet interface           product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller         vendor: Realtek Semiconductor Co., Ltd.         physical id: 0         bus info: pci@0000:01:00.0         logical name: eth0         version: 08         serial: 50:af:73:6b:33:f4         size: 100Mbit/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=full firmware=rtl8106e-2_0.0.1 04/23/13 ip= latency=0 link=yes multicast=yes port=MII speed=100Mbit/s         resources: irq:105 ioport:1000(size=256) memory:d0504000-d0504fff memory:d0500000-d0503fff       *-network UNCLAIMED             description: Network controller         product: BCM43142 802.11b/g/n         vendor: Broadcom Corporation         physical id: 0         bus info: pci@0000:02:00.0         version: 01         width: 64 bits         clock: 33MHz         capabilities: pm msi pciexpress cap_list         configuration: latency=0         resources: memory:d0400000-d0407fff  

lsmod has ath9k at its result, but no wl.

My questions are

  1. Can network manager support 2 wireless drivers?

  2. if not, how do I switch between drivers?

  3. where is my wlan0?

Please help me find wlan0.


cd backports-3.16-1  sudo make uninstall  

Reboot and if it still doesn't work do:

sudo apt-get update && sudo update-pciids  sudo apt-get install --reinstall bcmwl-kernel-source  

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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