Re: After last upgrade (sid) thz connection wifi doesn't work

[Gerard Robin <g.robin3@free.fr>]

On Mon, Aug 25, 2008 at 05:55:40PM -0400, Celejar wrote:
> From: Celejar <celejar@gmail.com>
> To: debian-laptop@lists.debian.org
> Subject: Re: After last upgrade (sid) thz connection wifi doesn't work

> On Mon, 25 Aug 2008 19:02:16 +0200
> Gerard Robin <g.robin3@free.fr> wrote:
>
> > On Mon, Aug 25, 2008 at 12:07:00PM -0400, Celejar wrote:
> > >From: Celejar <celejar@gmail.com>
> > >To: debian-laptop@lists.debian.org
> > >Subject: Re: After last upgrade (sid) thz connection wifi doesn't work
> >
> > >Try stopping the avahi-daemon; it can apparently muck things up.  
> > same result.
> >
> > >What does 'iwconfig ath0' give?
> > ath0      IEEE 802.11g  ESSID:"JAG76"  Nickname:""
> >            Mode:Managed  Frequency:2.437 GHz  Access Point: Not-Associated   
> >            Bit Rate:0 kb/s   Tx-Power:16 dBm   Sensitivity=1/1  
> >            Retry:off   RTS thr:off   Fragment thr:off
> >            Encryption key:off
> >            Power Management:off
> >            Link Quality=0/70  Signal level=-96 dBm  Noise level=-96 dBm
> >            Rx invalid nwid:259252  Rx invalid crypt:0  Rx invalid frag:0
> >            Tx excessive retries:0  Invalid misc:0   Missed beacon:0
>
> Ok, so the card is apparently not associated with the AP.  
You got me a good clue : I saw that Access Point: Not-Associated  
and I did :sudo ifconfig ath0 to get my HWaddr
after that I did: sudo iwconfig ath0 ap xx:xx:xx:xx:xx:xx
+ sudo dhclient ath0 and now the wifi works fine :-)

I don't understand truly why I lost my connection wifi.
Perhaps it happened when I changed my key WPA: 
I changed it in /etc/network/interfaces but I forgot to change it
in /etc/wpa_supplicant.conf 

> What does 'iwlist ath0 scan' give?  Does 'ifconfig ath0 up' followed by 'iwconfig
> ath0 essid nnnnnnnn' accomplish anything?

Many thanks for your help and sorry for the trouble. 
--
Gérard