wi fi - Samsung Galaxy 5 Wi-fi stops working: "ar6000 driver fails to load"

My Galaxy 5 has this problem for some months now: wifi stops working, I try to enable it and the phone says "Error" without any other further information. The only way to make it work again is rebooting the phone. I think this problem has been related here before.

But I managed to save the system log and got the following:

08/04/2011 23:01:50 [ERROR] WifiService(166) setWifiEnabledDialog: true

08/04/2011 23:01:50 [ERROR] WifiService(166) ****************setWifiEnabledDialog(), allowWifi****************true
08/04/2011 23:01:50 [INFORMATION] WifiService(166) setShowAccessPointListDialog():true
08/04/2011 23:01:50 [INFORMATION] WifiService(166) setWifiEnabledDialog(): true
08/04/2011 23:01:50 [INFORMATION] wlan_tool(11010) wifi loading 
08/04/2011 23:01:51 [INFORMATION] wlan_tool(11014) Driver is initialized. load it 
08/04/2011 23:01:51 [INFORMATION] wlan_tool(11021) ar6000 driver fails to load 
08/04/2011 23:01:51 [INFORMATION] wlan_tool(11029) wifi unloading 

I'm trying to understand what's going on here. What exactly is ar6000? Maybe the network interface? How can I get more information about the error itself?

I have already uninstalled almost any app that could change the wifi behavior, and the problem persists. Juice Defender is still installed, but the problem already existed before I first installed it.

Answer

I've seen a number of people report that the WLAN test dialer code will allow the driver to reload properly (example). I believe it's *#*#526#*#* on many Samsung phones, but this post indicates that it may also be *#*#528#*#* or *#*#232339#*#*. This may not work on all devices, since manufacturers tend to include/remove different dialer codes almost at a whim.

If you're unfamiliar with dialer codes, simply open your dial pad and enter the sequence as though you were attempting to dial the number *#*#526#*#*. Your phone should then jump to the WLAN test facility.