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I'm using Ubuntu 10.10 on an hp dv4 and my wifi was working just fine(except the wifi led blinking) till yesterday. Now when I touch the wifi button it just won't switch ON!!! :o I didn't make any changes yesterday but updated my system today.

I have no idea what happened. Any clue???

I ran the command sudo lshw and got its output as:

*-network DISABLED
            description: Wireless interface
            product: AR9285 Wireless Network Adapter (PCI-Express)
            vendor: Atheros Communications Inc.
            physical id: 0
            bus info: pci@0000:02:00.0
            logical name: wlan0
            version: 01
            serial: 90:4c:e5:58:14:34
            width: 64 bits
            clock: 33MHz
            capabilities: pm msi pciexpress bus_master cap_list
            ethernet physical wireless
            configuration: broadcast=yes driver=ath9k
            firmware=N/A latency=0 link=yes
            multicast=yes wireless=IEEE 802.11bgn
            resources: irq:17 memory:96400000-9640ffffmemory:96400000-9640ffff

The network is disabled?!? :o i tried to enable it by right clicking on network manager but the Enable wireless button has been greyed out.

I opened the file /var/lib/NetworkManager/NetworkManager.state and found that the contents are

[main] NetworkingEnabled=true WirelessEnabled=false WWANEnabled=true

I tried to change WirelessEnable=false to WirelessEnabled=true but after reboot it resumed back to the same state.

share|improve this question
That stupid touch-sensitive button has got to be the worst idea ever in the history of computer case design. – Pointy Oct 20 '10 at 16:27
up vote 2 down vote accepted

Try rebooting. If it's still offline after the reboot, press the wifi button once more and restart again.

I had a similar issue with this on my dv5.

share|improve this answer
it didn't work for me :( – Gayathri Oct 20 '10 at 17:16
ok! it worked today :o – Gayathri Oct 21 '10 at 12:43

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