PTK cipher mismatch

Dan Williams dcbw
Wed Jun 7 07:06:28 PDT 2006

On Wed, 2006-06-07 at 14:29 +0300, Mihai Maties wrote:
> Hi,
> I just upgraded my laptop from Ubuntu Breezy to Ubuntu Dapper and noticed that 
> I cannot use the wireless network anymore. Before upgrading, I used 
> wpa_supplicant to authenticate (LEAP), but now I cannot connect. Of course, I 
> tried exactly the same configuration file, but since it didn't work, I 
> began "tuning" parameters... unfortunately without success.
> Things that got upgraded are:
> - the kernel - from v2.6.12 to v2.6.15
> - the ipw2200 driver - from v1.1.0 (manually compiled) - to v1.1.1
> - wpa_supplicant - from v0.4.5 to v0.4.8
> One major thing that changed and needed adjustment in my conf file was the 
> transition from "ipw" to "wext". After studying the debug output I see that 
> even though the SSID matches, all access points are ignored with a 
> message "skip WPA IE - PTK cipher mismatch".
> I attached the full output 
> of "wpa_supplicant -c/etc/wpa_supplicant.conf -ieth1 -Dwext -t -ddd". 

Can you post the section of your config file that refers to the AP(s)
you are attempting to connect to?

Can you also post what's on line 35 of your config file?


> What am I missing here ?
> Mihai
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