Has anyone noticed an issue with Dell D620 Laptops using the Intel 3945 card and WinXP with regards to PEAP authenication (mschapv2)? We are migrating to a LWAPP enviroment, but current we have a large autonomous AP enviroment. We have a very mobile group of users that just received new laptops and ever since they have had random connections issues with the 3945Intel card. The laptop will go from full strengh to no strengh without even moving. At times the laptop even gets in a state where it requires a reboot in order to get authenictated. We have tried the newest Intel proset 11.1 and that doesn't seem to have resolved the issues. There is nothing in any logs to point to an issue. You can have an older laptop with an intel 2200card right next to it and not have these issues.
Ensure that you don't have 2 client connection managers enabled in your PC. For example, a Microsoft WzC and a ADU on the same pc will result in lot of connectivity issues. In such cases. disable one of these client utilities.