View Full Version : [ubuntu] wifi detected but not connecting

April 1st, 2010, 08:43 PM
I just installed ubuntu 9.10 in my freinds laptop and it has a realtek 81878 wireless card...it detects the wireless networks but when i connect it just keeps on asking for the authentication key again and again...
To help you more,,,
lsusb gives me
RTL8187B wireless 8;odba:8189

April 1st, 2010, 10:57 PM
what does ifconfig -a give you for you wireless card should be labeled wlan0 something like that. is it being assigned an inet address?

April 2nd, 2010, 10:12 AM
Yes,,,there is a Wlan1...but no inet address assigned:(

April 2nd, 2010, 10:25 AM
I downloaded the official driver from realtek site...now ifconfig -a
gives wlan2 with an inet address assigned but does not connect...now what?

April 2nd, 2010, 12:49 PM
Sorry this is not immediately solving your problem, but I hope it may shed some light.

I have a similar problem, but I can make it appear and make it go away by switching the kernel when I boot.

I have several kernel releases on my PC from up to

If I boot from, my wifi connection works instantly with no problems. When I switch to any more recent version I can "see" my wifi router, but it refuses to make a connection. As soon as I reboot back to, everything works again without my making any changes.

If you have that kernel, it would be really interesting if you could try it.

I wonder if anyone knows of any log files that the wireless software might create while it is making connections? That might give a clue to what is happening.

April 2nd, 2010, 02:50 PM
Please help me some one....don't we have any wifi experts over here

April 2nd, 2010, 04:54 PM
can anyone tell me if i use xp driver with ndiswrapper....ny guide for it?

April 2nd, 2010, 06:11 PM
any ideas nyone....m fed up:(

April 19th, 2010, 04:56 PM
any ideas nyone....m fed up:(

A look through the sticky post at the top of this forum might be of help:http://ubuntuforums.org/showthread.php?t=885847