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I have purchased a new Dell inspiron 15 3521 laptop. Initially both wired LAN as well wireless in not working. After configuring the manual IP address for LAN, wired network is working. Wireless is also working for some time after upgrade and restart network-manager. Suddenly it is not working. output of various commands are as follows. can someone help me on this.

Thanks in advance for your support.

lshw -C 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: 05
       serial: 74:86:7a:42:f0:ac
       size: 100Mbit/s
       capacity: 100Mbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: 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=rtl_nic/rtl8105e-1.fw ip= latency=0 multicast=yes port=MII speed=100Mbit/s
       resources: irq:42 ioport:2000(size=256) memory:c0404000-c0404fff memory:c0400000-c0403fff
       description: Wireless interface
       product: QCA9565 / AR9565 Wireless Network Adapter
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlan0
       version: 01
       serial: 3c:77:e6:a0:4c:85
       width: 64 bits
       clock: 33MHz
       capabilities: bus_master cap_list rom ethernet physical wireless
       configuration: broadcast=yes driver=ath9k driverversion=3.2.0-58-generic firmware=N/A ip= latency=0 multicast=yes wireless=IEEE 802.11bgn
       resources: irq:17 memory:c0500000-c057ffff memory:afb00000-afb0ffff
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.

uname -a
88-Ubuntu SMP Tue Dec 3 17:37:58 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

lspci | grep -i wireless
02:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)

rfkill list all
1: dell-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no
2: dell-bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no
3: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
4: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
share|improve this question
did it work while using the live CD? you can just copy over the configs if it did. – virtualxtc Jan 8 '14 at 11:19
What is the output of nm-cli? – Braiam Jan 8 '14 at 13:11
You might want to test kernel-backports. – davidbaumann Jan 29 '14 at 1:43

Well. When I Install ubuntu 12.04 lts on my lappy the internet did not work so i entered the grub and menu chose "restore system to factory settings" and it sort of reinstalled ubuntu and i could chose the option to connect to network and then chose the network

That worked for me

Maybe it'll work for you too

share|improve this answer

Install ndiswrapper

sudo aptitude install ndiswrapper-common ndiswrapper-modules-1.9 ndiswrapper-utils-1.9

Install the WiFi driver (from Windows):

sudo ndiswrapper -i yourdriver.inf

Check the driver is working:

sudo ndiswrapper -l

Load the module:

sudo depmod -a

sudo modprobe ndiswrapper

Configure modprobe so that it loads ndiswrapper:

sudo ndiswrapper -m

Edit the modules to add ndiswrapper at the end:

sudo gedit /etc/modules

Remember to add ndiswrapper at the end.

Hope you now have your WiFi back!

share|improve this answer
@Brask-- He already has a driver for his wireless, ath9k, as you can see. – chili555 Jan 8 '14 at 14:31

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