I am new to Ubuntu and I know there were a lot of similar issues and I've tried to follow some of the answers on the web (e.g. Dell Inspiron Wifi off or How do I get an Atheros AR8162 working?), but none of them are working, or are causing more errors along the way.
Recently I bought new Dell Inspiron 15 with installed Ubuntu 12.04 on it, but there are no options were to connect to wifi. My router is working and all other devices are seeing it.
Here is some information that you might need for advice. I'll be happy to provide anything further, please help me.
$ iwconfig eth0 no wireless extensions. lo no wireless extensions. $ rfkill list all 2: hci0: Bluetooth Soft blocked: no Hard blocked: no iwlist scan eth0 Interface doesn't support scanning. lo Interface doesn't support scanning. lspci | grep Network 02:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01) sudo lshw -class network *-network description: Ethernet interface product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:01:00.0 logical name: eth0 version: 07 serial: 74:86:7a:4c:6c:b8 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 ip=192.168.0.102 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s resources: irq:61 ioport:4000(size=256) memory:c0700000-c0700fff memory:c0400000-c0403fff *-network UNCLAIMED description: Network controller product: QCA9565 / AR9565 Wireless Network Adapter vendor: Qualcomm Atheros physical id: 0 bus info: pci@0000:02:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: latency=0 resources: memory:c0600000-c067ffff memory:9fb00000-9fb0ffff lsmod | grep ath ath9k 133223 0 ath9k_common 14054 1 ath9k ath9k_hw 399752 2 ath9k,ath9k_common ath 24124 3 ath9k,ath9k_common,ath9k_hw dm_multipath 23306 0 scsi_dh 14589 1 dm_multipath ath3k 12918 0 mac80211 555318 2 ath9k,b43 bluetooth 212001 25 bnep,rfcomm,btusb,ath3k cfg80211 208382 4 ath9k,ath,b43,mac80211
Using these helped
`sudo apt-get install linux-backports-modules-cw-3.10-precise-generic sudo modprobe ath9k `
but not for a long time. Then I tried this advice and wifi works again: