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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.

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ar6000 is the driver for the Atheros 6k Wifi chipset. From browsing on XDA, it seems to be a common issue with Galaxy, not sure if there is any fix yet, though many reported that reboots works. –  Lie Ryan Sep 11 '11 at 0:18
    
Yeah, I've noticed this is a pretty common problem unfortunately. I had the hope that bringing this log would help to understand the causes, but up to now it's being useless. Thanks for the link about the driver. –  Paulo Guedes Sep 12 '11 at 16:06
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4 Answers

up vote 6 down vote accepted

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.

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great! it worked. :-) finally a better solution than restarting the phone. –  Paulo Guedes Dec 25 '11 at 23:57
    
All three of these codes bring up the correct interface on my GT-5570, which manages to successfully load the drive; unfortunately it then fails to find any networks when it scans. –  Jules May 8 '12 at 11:32
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http://wiki.openmoko.org/wiki/AR6K

wifi driver issue, factory reset or firmware upgrade could help you.

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Answers that provide no information except a link to somewhere else are not answers at all. What happens when that link stops working, for instance? –  Al E. Dec 2 '11 at 14:07
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One thing I've tried on several models of Galaxy's is to do a Factory Reset in the "Settings" menu. For some reason the WiFi drivers get corrupt and a reset fixes this every time.

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Something that's helped me with similar Wi-Fi errors on my Vibrant is the Blade Wi-Fi Fix. You might give it a shot and see if it works for you.

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Unfortunately did not solve the problem. –  Paulo Guedes Dec 17 '11 at 12:11
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