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ubuntu networking issues 101

post #1 of 8
Thread Starter 
So i've been trying to connect to my wifi for an hour now and i am all out of ideas.

I have not changed any settings since this morning and it worked just fine earlier, but is faling to connect right now...strange.

Its finding the network when i do "iwlist ath0 scan" and quality signal is acceptable. Then I continue to do "iwconfig ath0 essid myessidhere" , "ifconfig ath0 up" and "dclient ath0" ...dhcp client runs a while and comes back with "No DHCPOFFERS received". So i thought maybe a crappy signal, wouldn't be the frist time. So i brought the laptop point blank to the router and tried connecting. No love. I tried connecting by wire, but no love (this doesn't stress me because my lan card is kinda sh*tty and only works 1/2 the time anyway). Then as I was walking back to my room I restarted and what do you know...it connected, but as soon as i got back to my room and plugged in the usb devices / power cable the connection died again. So i disconnected and walked up closer to the router and restarted again...no love.

Then i tried my pcmcia card which works pretty damn well typically. Hell, I am using the card on my Thinkpad right now, sitting right next to the other laptop..so I know the router signal, although kinda weak, is good enough to reach way the hell to my room. Anyway, with the pcmcia card trying to connect nothing, restarting with the pcmcia card didn't do much good either.

my config is dapper using the madwifi from restricted modules which haven't been upgraded since this morning...all the software and hardware is exactly the same...worked in the morning...not anymore.

ideas?
post #2 of 8
Usually, when my WiFi, DHCP or LAN disappears up it's own posterior, I find restarting the router kicks it all back into action..

Granted, that could just be a slightly buggy firmware on the Draytek, but it's worth a shot, right?
post #3 of 8
I had the same problem once. I just ended up dumping the wireless and reconfiguring.
post #4 of 8
Thread Starter 
yeah i reset the router....no love. good try though.
post #5 of 8
AaronJB is dead on, typically that seems to be a router problem. Boot up a computer from scratch thatw as working and see if it can connect or not to. Also assign the laptop an IP address from the DHCP pool manually that is not being used and then ping your router. Repeat step one with wired connection, both known working and the laptop in question.

In other words check your router repeatedly

Seablade
post #6 of 8
Also feel free to check your card in another laptop, and other cards in that laptop if you have access to them.

Seablade
post #7 of 8
Thread Starter 
well it seems i found the solution. at one point the hardware switch for the wifi went out...and needed to be re-enabled, but i am pretty confident that happened AFTER i couldn't connect....so yeah, prolly resetting the router is what did the job.

thanks guys

that was an hour well wasted
post #8 of 8
Well, that's what computers are best at
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