I have a Dell Inspiron laptop and PCLinuxOS 2010.7 installed on it. The WIFI card/access works fine most of the time. However, from time to time (and I have yet to find a pattern to it) the WIFI card appears to disappear. I'll open the network manager and try to rescan the network and nothing is present. I'll go to the pclos control center and attempt to remove/add the wifi card again, but it tells me the hardware isn't present. However, if I reboot the system, it is immediately back. A reboot fixes it every time. Any ideas? Is there something I can try to 'reactivate' the wifi interface without rebooting (atleast in an attempt to trouble shoot).
Oh, and also, when I do an ifconfig while the WIFI interface is 'gone', wlan0 does not show up in the listings.