working wireless card stopped working on previously working wireless Ubuntu 11.04

[Ioannis Vranos]

On Mon, Jan 16, 2012 at 12:27 PM, Abhishek Dixit <abhidixit87 at gmail.com> wrote:
>>> Have you checked in the BIOS to see if anything there mentions wifi?
>> I did check bios but there is no such option to disable wifi .
>>
> Yes I have seen and wifi there is not switched off.
>
> I noticed this problem started since I did suspend and resume of my
> laptop i.e. close the flap of laptop and then reopen it.It is this
> time that laptop gets suspended and and resume again.
>
> After this I erased entire Ubuntu 11.10 from my system and did a clean install.
> Installed STA driver from the additional drivers section.After this
> got my wireless  working.But I as soon as I close the flap of laptop
> and then reopen it again the connectivity goes and rfkill list command
> shows
>
> rfkill list
> 0: brcmwl-0: Wireless LAN
>        Soft blocked: no
> Hard blocked: yes
>
> and then onwards I can not connect to any kind of wireless network.I
> did not switched off the wifi button as rfkill command above shows
> Hard blocked.
> Now I do a reboot and then wait for some time.First attempt to connect
> to available wireless network fails.After some time it is able to
> connect.
> and this time rfkill list shows
>
> rfkill list
> 0: dell-wifi: Wireless LAN
>        Soft blocked: no
>        Hard blocked: no
>
> I have not at all touched the hardware wifi switch.If you notice
> closing the laptop flap while working and reopening causes this
> problem.This seems to be some problem in STA driver power management
> module.

Check your BIOS if it has an option called "Airplane mode". If it has
it, disable it.

It would be great if we knew what laptop model you have, so as to have
a look at its BIOS settings in its manual, on line.


-- 
Ioannis Vranos

http://cppsoftware.binhoster.com