I was having this issue with my Dell Precision M70 laptop until I made this tweak to the Intel Pro Wireless 2200BG card that is built-in and so far its seems to be making a difference with it connecting to our Cisco 541L APs and acquiring a DHCP from our network. However, the only thing different I noticed after making this change is that it is initially a bit slow at connecting to the Cisco APs.
http://www.intel.com/support/wireless/wlan/sb/cs-006205.htmUse Intel® PROSet/Wireless WiFi Connection Utility to Set CAM1. Click Advanced > Adapter Settings > Advanced tab. 2. Select Power Management and uncheck Default / Auto and move the slider to Highest / Maximum Performance.If the slider is already at Highest / Maximum Performance, move the slider to another setting and then back to Highest / Maximum Performance.
We are still experiencing this issue with our Dell Latitude E4200 laptops but need to verify that they are using the latest wireless network adapter drivers. In addition, I am planning to tweak the PSP as I did with the Intel Pro Wireless 2200 BG.
F.Y.I. Our PDC and Primary DNS server is a Windows Server 2000
Our BDC, Secondary DNS and DHCP server is a Windows Server 2003
Any help or suggestions would be greatly appreciated!