I'm running squeeze using XFCE and the XFCE Power Manager. When my laptop come back on after a suspend, the wireless is no longer connected to the router. If I perform "ifdown wlan0" and "ifup wlan0", the network usually starts up fine. Some times "ifup" cannot get an IP address from the router. How can I troubleshoot this? I'm sure this has been answered many times before. Apparently, my Google skills are not up to finding the answer.