Database Develop

Kaiser - Wifi problem (expert opinion needed)

Recently I've been having problems with my Kaiser connecting to my Wifi.
Here is what happens reliably (when phone on it happens more often):
1) Turn on wifi from comms manager (it searches relentlessly)
2) If I try to turn wifi off in command manager at this stage it hangs the comms manager - not even task manager will be able to close it down.
If I turn the phone off (button) then it won't turn on again till a soft reset.
3) soft boot or remove battery - Kaiser comes back with wifi connected immediately most of the time however, it can also come back still searching in which case repeat soft reset or hard reset.
4) Once connection is established - I can connect / reconnect ok till the device is turned off then it happens again. If phone is off it appears to happen more reliably but I've not tested this enough, it happens either way eventually.
So phone on is 95% reliable but can be ok for a couple of times.
5) Once the wifi is in search mode the comms manager is useless and this continues ad infinitum (any attempt to turn wifi off will hang CM) and always a soft boot will bring the device back with a connection established to my wifi point.
Here's what I've tried:
1) Soft boot / battery removal
2) Hard reset without restoring any kind of back up -ie virgin restart
3) Hard reset without allowing custom install of t-mobile software.
Details of my device:
1) T-mobile Win mobile 6 - original rom
2) Hard SPL : SPL-1.0 Oliprof (CPLD-8)
so the only thing I've done to this machine is installed Oli's Hard SPL.
It appears therefore that no software is causing the problem. I am wondering if there's a possibilty of the Hard SPL causing a problem through corruption or do I have a hardware fault with the radio?
I'd be grateful for any help on this as to what I should do next. Please don't tell me to load win6.1 as this worked fine till now so isn't the problem. The only thing I can think of is to re-do the hard spl.
EDIT: Well I've just reloaded Hard spl 1.0 and the problem is the same so I'm out of ideas.

Just a few thoughts - although I do not have problems with my Kaiser, I have met problems with other folks.
1
Is the signal quality good - we know the range is not fantastic, so it's worth checking:
Start>Settings>Connections>Wireless Lan (Icon)>Main and look at the Signal Quality.
2
Start>Settings>Connections>Wireless Lan (Icon)>Power Mode(Tab) and change to best performance.
3
Does it do this with other networks? Don't rule out the Router creating difficulties.
4
Do you let the Kaiser go to sleep mode with wifi connected. If so I'd advise you terminate the connection in comm manager and turn off using on/off button rather than allowing auto sleep mode.
5
It might be better to allocate a fixed IP address rather than allowing the router to set it. Hangs can be created in the IP allocation stage.
6
Do you have any applications set to auto collect data? These could be weather apps, mail, time sync, quick GPS etc etc etc. If so you can try disabling those settings to ensure the crash is not a conflict between setting up the connection and simultaneous data collection.
These can be pesky problems to track down. I suspect that many of the above would be ruled out by your clean boot after a hard reset. If it always works initially after a hard reboot though, it does suggest that another app/process is interferring at a later stage.
Mike

mikechannon said:
Just a few thoughts - although I do not have problems with my Kaiser, I have met problems with other folks.
Click to expand...
Click to collapse
Thanks Mike for your valued input.
Just to answer the questions:
1) Yes signal is excellent (I connect in 3 cycles of the animation plus after reboot it connects immediately)
2) I've tried these options - my current setup worked perfectly before, plus of course a hard reset and clean machine displays the same problems
3) I haven't tried on other networks but I've eliminated the router as the problem. I've tried dynamic / fixed - I normally allocate ip via the router plus lock down mac addresses. opened the system. However, this doesn't surprise me because I can cause this lock up without a connection. It's more rare but for instance, if I turn the phone on and delete my signin, normally this pops a dialogue asking which network to connect to. Sometimes that doesn't come up and it still hangs. It is more rare though.
4) No
5) yes tried all optons
6) No and especially not on a clean machine.
I've had the device for some time without any problems so something has changed quite radically which makes me think h/ware. If I were diagnosing this on a pc I'd be looking at both H/ware or a possible driver problem as it the network adapter is locking when it's accessed, however, on this device I don't see the logic of drivers unless they can somehow corrupt in rom even after a hard reset. Is that possible or heard of?
One observation is that when I get the hang and I try to look at the wifi settings I get the following message:
Code:
"To configure your wireless network, please enable your wireless network card".
This little clue seems to point at somethhing that's caused the adaptor to cease responding but somehow in the process locking the comms manager up (ie. if I goto comms manager and try to turn the wifi off, I'll get the spinner ad infinitum). Yet a reboot will kick it back into life again. And notably once it's running, and providing I don't switch the machine off, it'll work till the cows come home perfectly reliably.
I guess my question is whether there is any possible software cause that could exist AFTER a hard reset? Also the reliablity of this problem is enhanced considerably if 1) I have the phone turned on and 2) if I turn the machine off and back on and try to reconnect. Maybe that could indicate a power issue making the adaptor die I don't know what else would make the adapter lock up.
So far I've re-installed the (same) radio and Hardspl and neither of these have changed anything. I could of course go the final step and install the rom again but I haven't done yet as I wasn't sure what components other than the radio might be relevant in the rom.
Edit:
If it always works initially after a hard reboot though, it does suggest that another app/process is interferring at a later stage.
Click to expand...
Click to collapse
Just to clarify this: Wifi connects 90% after a soft boot initially. A hard reset makes no difference to the behaviour.

It may be a hardware issue, but it would be last on my list of suspects. (I KNOW it must feel as if you have tried everything already – and I think perhaps you have!!!)
Just a couple of further suggestions – since I am certainly not sure where the problem lies.
Having done a Hard Reset, I would 95% rule out a software issue on the phone (though it is possible with corruption of original data – but a remote possibility I think).
I hesitate to suggest a router factory reset, but it may be worth trying.
Two more things to try:
http://forum.xda-developers.com/showpost.php?p=2406606&postcount=19
http://forum.xda-developers.com/showpost.php?p=4233158&postcount=20
I am curious about why having the phone enabled causes more crashes. Have there been any phone network changes in your area. It crosses my mind that there have been a few reports of wifi problems when 3G is being used. Perhaps you could, as a test, try limiting the phone to GSM only and then testing wifi:
start>settings>phone>band – set gsm on both drop down lists.
Mike

Hi Mike thanks for sticking with me on this.
mikechannon said:
Having done a Hard Reset, I would 95% rule out a software issue on the phone (though it is possible with corruption of original data – but a remote possibility I think).
I hesitate to suggest a router factory reset, but it may be worth trying.
Click to expand...
Click to collapse
There are a few reasons why I didn't spend more time on the router once I'd established a few things:
1) The adpator actually hangs and it causes abnormal behaviour on the machine. ie. comms manager hangs if you attempt to try to turn off wifi and the spinner comes up. Even more abnormally this causes one of two scenarios, either a) the machine no longer turns off or if you manage to turn off it won't turn on again. So it's causing a major problem with the whole system.
In my experience a no-connect situation never results in a hang, it just times out and a list pops up of other alternative wifi networks it's found and you can always just turn wifi off or use the machine normally at this point.
2) Wifi connects to my router no problem, always has and still will first time from a boot (providing I tried to turn wifi on and it failed before the boot). After a hang and reboot it comes back always connected - doesn't even search, it's a solid non animated connection icon. In other words the card has woken up and therefore has no problems with my router once it's alive.
As an outside chance that the router is getting confused about a disconnect / reconnect I've also rebooted it in between just to make sure - but the router can't tell my machine to hang or fail to respond.
3) I have managed to get this to hang after deleting my settings, ie. stopping it from logging on to my router but rather letting it come up with a list of wifi points it's found. Most of the time the list comes up but after several tests I've confirmed that it does eventually happen. The symptoms are the same when it does. At this point no list appears and we end up with the same deal as in 1)
Having said that I can give the router a try - resetting it isn't too much of a problem as I can backup my configuration but I'm pretty certain it's not the problem bit when problems get wierd then logic sometimes goes out the window and one has to try everything.
http://forum.xda-developers.com/showpost.php?p=4233158&postcount=20
Click to expand...
Click to collapse
I'll follow the registry one just in case but both those threads seem to be from people who can't get a wifi connect at all, usually for s/ware reasons. This is different to my problem which is an abnormal adaptor / system hang caused by accessing wifi.
I am curious about why having the phone enabled causes more crashes. Have there been any phone network changes in your area. It crosses my mind that there have been a few reports of wifi problems when 3G is being used. Perhaps you could, as a test, try limiting the phone to GSM only and then testing wifi:
Click to expand...
Click to collapse
I'm curious too. I thought a problem with the radio as a whole but I've tested GPS and bluetooth without any problems, both on plus the phone. I also thought that some kind of power issue. If the voltage to the adapter for some reason dropped below a certain point it would kill it till it was kicked back into life. Just a theory. What would cause this, I've no idea, faulty component, dry joint perhaps.
I also had similar thoughts as you on possible changes to the phone service till I finally found it could hang without the phone too just less. This is like 30% to 95%, but multiple on/ off of the wireless and a couple of machine power offs will get it to happen when the phone is off. It just takes a bit more encouragement.
As for 3G I have mine disabled. I only ever turn it on if I am out and need internet via my service. I got caught out when T-mobile's 3G kicked in, in my area and my battery life went to hell about 18months ago - since then it stays disabled.
EDIT: This may or may not be relevant but I hadn't figured out which situation causes failure turn off. If comms manager is hung after a trying to turn wifi off the machine WILL turn off but not back on again. I just found that one other dialogue that hangs is going into the Wifi settings > network adapters > IEE 802.11b/g wifi adapter. This dialog hangs solid. At this point the off button does nothing. It's a reset. Just a strange reversal but it's also a confirmation that the adapter itself is the problem or has been put into a very nasty state.

[Q] Turning on... Error Turning on... Error WIFI bug

Hello guys,
I have wiped my phone, and tried many, many roms, mostly Darky and Docs roms over the last year, and ALL of them have this wifi bug where sometimes my phone connects to a wifi, and other times I have to restart my phone and only then will it connect.
When it does not connect it says Turning on.... then says Error. I press again, it says Turning on again etc. Occasionally it connects eventually after I try again and again, but usually I have to restart the phone first.
Does anyone know why this is and what to do to fix it. It is very frustrating, especially when in front of an iphone fundementalist.
Help much appreciated!
tx
Mark.

i have this same problem
a fix would be so nice.

try different router.
if you have tried different Rom and kernel then it can't be that.
only your router or phone is bad.
**DamianGTO Steam kernel. 350MB Ram. 500HZ. all ext2. Steam Rom. Js5**

i find this problem is app specific. if i connect before anything is open its fine. if i open a 3rd party browser in edge data mode then switch to wifi while loading a page this error occurs sometimes. tested with 3 different routers and one sgs phone dxjpe modem

alexanderct said:
i find this problem is app specific. if i connect before anything is open its fine. if i open a 3rd party browser in edge data mode then switch to wifi while loading a page this error occurs sometimes. tested with 3 different routers and one sgs phone dxjpe modem
Click to expand...
Click to collapse
maby its the modem. never seen this before..
**DamianGTO Ultimate kernel. 350MB Ram. 600HZ. all ext2. Steam Rom. Js5**

I get the error too. The only fix I found was to enter flight mode and then turn on wireless and then exit flight mode.
Sent from my GT-I9000 using XDA App

icejagans said:
I get the error too. The only fix I found was to enter flight mode and then turn on wireless and then exit flight mode.
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
AAH I will try that!
It is not the router, I have the issue on every router I have tried. Ive also verified that Static IP and Dynamic makes NO difference at all to this problem.
I'll report back on the flight mode work-around... a lot faster than rebooting, cheers,
Mark.

Anyone know a fix for this bug?
Gad, at times like this I envy my wife's iphone, which JUST WORKS. My SGS has been spared me smashing it to bits out of frustration on several occasions...
I tried the flight mode suggestion, it does not work. The only thing that works is restarting the phone... which takes ages and Launcherpro has to be forced shut then restarted, media scanned etc etc... and only THEN can I try the wifi again, so its not a viable work-around.
Anything else to try ?
tx
Mark.
icejagans said:
I get the error too. The only fix I found was to enter flight mode and then turn on wireless and then exit flight mode.
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse

hey guys i think im having the same problem.... i got my sgs and upgraded it to stock 2.2... had the problem then even... it connevts to the router fine... but then after like 10 mins its still connected it says but no data is being transferred... doesnt open webpages etc etc...
then i upgraded to darkys 9.2... and im having the exact same problem... only when i restart the phone the wifi works again for a while... then same problem... wifi is connected but it just doesnt transfer any data.... its reallly frikin frustrating having to reboot over and over and wait for everything to load up like someone else posted i think....
apparently there is some allshare thing thats supposed to help but i think thats a diff problem altogether cuz thats for wifi not connecting at all i think... her wifi does connect but no data...
someone needs to fix this issue somehow :S

DrunkFuX666 said:
hey guys i think im having the same problem.... i got my sgs and upgraded it to stock 2.2... had the problem then even... it connevts to the router fine... but then after like 10 mins its still connected it says but no data is being transferred... doesnt open webpages etc etc...
then i upgraded to darkys 9.2... and im having the exact same problem... only when i restart the phone the wifi works again for a while...
Click to expand...
Click to collapse
Hi
Darkys alternative wifi does not fix the problem. But my problem is not exactly like yours, my phone generally stays connected when it connects, where your connection stops working. Mine only becomes impossible to connect without rebooting sometimes. Occasionally it seems switching from STATIC to DYNAMIC or DYNAMIC to STATIC IP jiggs the phone's wifi somehow, and it then works, but often it just says Turning on... and nada!
Yep, a fix is desperately needed.
Mark

Hello
Having the same problem here. But let's just clarify. At least for me, and from the OP's description, the problem is NOT wifi not being able to connect. It is Wifi NOT TURNING ON at all. Takes a LOONG while with "turning on" and then "error" appears. Sometimes trying over and over again will fix it. Sometimes a full reboot, which as someone stated, is a royal pain.

Get this quite frequently. Doesn't bother me too much because it always works after the second time I turn it on (in the settings not in notifications) when it shows "Error".

Couple of things you could try:
Turn off Notifications under WiFi settings
Turn off Use Wireless Networks under Location & Security settings
My Wifi became a bit stable after this.
You could also try static ip addresses.

Had it happen last night. Went into task manager, killed everything that uses internet and retried it. It turned on immediately. Will test more to see if this is indeed a fix. It's still annoying enough, though.

bump
I have this problem for over 6 months. Any fixes anyone????
Maybe its a harware bug. I may take it into a Samsung Store

This still happens to me too...any fix? Is this hardware or something?

Had this issue when I was using SuperPower App where it takes control of the Wifi sleep. Removed it and never had it again. Any one of you using some sort of battery saver taking control of WIFI?

Same problem here
Same problem here on stock 2.2.1 ROM. Like others already mentioned, my problem is getting the WiFi to turn on. Once it is on, it's problem free, but turning it on sometimes takes minutes to only get an error. Mostly trying again, turns it on quickly. But this afternoon I tried three times without succes. Than, after reading a lot of forum discussions on this problem (we are not alone...), I tried turning off packet data and then WiFi turned on in seconds. This suggests that apps having an internet connection open could cause the problem. It also suggests that icejagans is right by stating to turn the phone into flight mode might resolve the problem. I am not running any battery saver, task killer or whatsoever that could cause this problem. Last Saturday I even did a factory reset to see if that helped, but no, it didn't... Getting really annoyed by this problem and I hope 2.3 will fix it!

Bumb!
Please does anyone have a fix for this? Does flashing a different modem help?

When this happens, I go to Allshare app and enable wireless (when asked), it always works

CM7 RC4 Wifi crashing

Ok so on the RC4 CM7 build my wifi is very unstable, whenever I attempt to download files it will randomly crash resulting in any files being downloaded without a restart bookmark being lost as I have to leave the program I'm in turn off Wifi turn it back on and then finallly i'm able to reconnect to the internet. Is anyone else having this problem? If you did, do you know how to fix it? I'm at my wits end here as there are programs I've had to try to download for over 2 hours because of these wifi crashes....
Thanks,
Adan

Adanedhels said:
Ok so on the RC4 CM7 build my wifi is very unstable, whenever I attempt to download files it will randomly crash resulting in any files being downloaded without a restart bookmark being lost as I have to leave the program I'm in turn off Wifi turn it back on and then finallly i'm able to reconnect to the internet. Is anyone else having this problem? If you did, do you know how to fix it? I'm at my wits end here as there are programs I've had to try to download for over 2 hours because of these wifi crashes....
Thanks,
Adan
Click to expand...
Click to collapse
I've had the exact same issue, and I'm not 100% sure yet, but mine completely went away when I uninstalled Setting Profiles Lite. I was using it to turn off Wifi every time it went into suspend mode (same settings I used on Eclair) but since I did that, wifi hasn't burped once. Like you I could barely download anything before it would stop and I had to turn off and back on wifi to make it work again for a while.

this seems to happen to me every morning between 5 and 7am.. most other times it works great.. i cant figure it out either

not using that program.....
Well I checked just to make sure and I am not using the program you mentioned so I am at a loss as to why the wifi will crap out randomly and have to be turned off then on... Any other ideas?
Thanks,
Adan

I'm having the same issue. No idea what's going on, but it's driving me crazy.
I don't seem to have the same trouble just surfing the web, but if I try to download anything or stream video, it craps out about every 5 minutes.
Sent from my NookColor using Tapatalk

Yeah, mine is still crapping out tonight too.. stock wifi works perfect. I am using CM7 on SD, anyone else?

yep yep yep
Exactly the same setup man. Using my CM7 on my SD card and WIFI runs just fine on my reg Nook software, Nookie Froyo, and HC sds i have run....

Adanedhels said:
Ok so on the RC4 CM7 build my wifi is very unstable, whenever I attempt to download files it will randomly crash resulting in any files being downloaded without a restart bookmark being lost as I have to leave the program I'm in turn off Wifi turn it back on and then finallly i'm able to reconnect to the internet. Is anyone else having this problem? If you did, do you know how to fix it? I'm at my wits end here as there are programs I've had to try to download for over 2 hours because of these wifi crashes....
Thanks,
Adan
Click to expand...
Click to collapse
This may be silly, but are you all setting your wifi to 'never sleep's on advanced settings under wifi settings? If you are not familiar with Cm roms, I can see how you might miss this essential setting. Just press the menu key after going into wifi settings, and a secondary menu will come up..with scan, and advanced...under advanced, set wifi sleep policy to never. Hope this helps, but if it's something you all already know, then please disregard.
Delivered by a little dude that lives behind your screen.

mazook98 said:
This may be silly, but are you all setting your wifi to 'never sleep's on advanced settings under wifi settings? If you are not familiar with Cm roms, I can see how you might miss this essential setting. Just press the menu key after going into wifi settings, and a secondary menu will come up..with scan, and advanced...under advanced, set wifi sleep policy to never. Hope this helps, but if it's something you all already know, then please disregard.
Delivered by a little dude that lives behind your screen.
Click to expand...
Click to collapse
yeah, thats one of the first things i do when installing a rom and the problem persists past that

Adanedhels said:
Ok so on the RC4 CM7 build my wifi is very unstable, whenever I attempt to download files it will randomly crash resulting in any files being downloaded without a restart bookmark being lost as I have to leave the program I'm in turn off Wifi turn it back on and then finallly i'm able to reconnect to the internet. Is anyone else having this problem? If you did, do you know how to fix it? I'm at my wits end here as there are programs I've had to try to download for over 2 hours because of these wifi crashes....
Thanks,
Adan
Click to expand...
Click to collapse
i have a mytouch slide and i have try everything and i have same issues with the wifi. a lot of you say to put the wifi on never sleep, but it dosent help. wifi issues still out there on rc4. please help.

ahernandez646 said:
i have a mytouch slide and i have try everything and i have same issues with the wifi. a lot of you say to put the wifi on never sleep, but it dosent help. wifi issues still out there on rc4. please help.
Click to expand...
Click to collapse
So this isn't specific to the Nook Color, it's a CM7 bug overall that Wifi falls out?
What's interesting is my wifi will stay connected, idle, for 8+ hours (while I slept) but I then download 2M of files while eating breakfast and it dies and I have to restart wifi to make it work again...
This is definitely going to make me wait until it's fixed to put CM7 on emmc, this is really aggravating. Which I hate, because I'm really digging CM7. It's perkier, runs smoother, and no B&N shortcut thingy popping up by accident all of the time.
So anyone NOT on SD seeing this problem on the Nook Color? Sounds like this might be a generic CM7 issue but I've also been told that heavy IO on the SD could cause IO problems in other areas, including wifi.

I'm not on SD and having the same problems.

http://code.google.com/p/cyanogenmod/issues/detail?id=3314
Can you guys go there and Star that issue and add your configuration and experience?
And please, if anyone figures out anything, be a hero and tell us I'm thinking about wiping fresh and not installing any apps and seeing if the behavior continues.

Popped out my CM7 SD card and booted to Eclair and just spent 45 minutes updating my apps I hadn't done in 4 days, read Engadget, read some news in Pulse, played a youtube video, downloaded some other data.
Not one hiccup.
CM7 is sooooo nice, hopefully this gets figured out. What's bad is that a lot of people say they don't have the problem, so something is going on.

BUMP
BUMP
Don't want this forgotten until it is fixed

I have been dealing with thisfora while and I seem to have come across a work around. I switched the security settings of my router and made it a compley open network. Since then, I've had zero issues. My wireless network is unsecure now, but I live out in the woods, so I'm not too concerned.
Sent from my NookColor using Tapatalk

Several people have reported this, specifically with the Nook Color. I personally haven't had wifi crashes or refusal to wake up, but I have noticed that websites take significantly longer to load on my Nook Color than they do on either my wifes or my Droid X. Obviously there are a ton of factors that could be responsible for this though.

Okay, so I tried everything I could think of.. Imaged back to totally clean CM7 RC4, not even gapps.. Fiddled with all sorts of CM Perf settings (vm heap, JIT, etc)
Considering I've also had the wifi dropouts on my phone, work, and home router I was convinced it could not be anything router specific, but I have an old Linksys B router that I keep up for my daughters computer which I have an ancient Prism wireless card in so I didn't have to run cables to her room.
It works. I used it about hour last night, off and on for a few hours today. No wifi hangs.
So my next step is to figure out if it's the router or the encryption... My B router has no encryption on it, just MAC filtering to keep out the neighbors. The G router running DD-WRT has WPA Encryption. So I'm going to disable Encryption on the G router and turn on MAC filtering and see what happens. If it works there, it must be related to encryption. If it still fails, it must be something related to the router or router FW.

Okay, first thing I did was change from TKIP+AES to only TKIP on my G router and so far so good. I found some other evidence that AES might be an issue:
http://forum.xda-developers.com/showpost.php?p=11598765&postcount=187
Anyone else, please try TKIP only if your router has AES available?

nopers
Sorry man I don't have AES as a option, so I'm not sure that is the problem...

[Q] Phone will connect to open wifi network but not secure ones

Had my phone for a few months now and recently found that it can't connect to my secure network at home.
When I turn wifi on I get the dreaded connect/disconnect message while it constantly tries to connect to my network. If I leave it on then the battery will drain overnight while the phone tries to connect. I have an iphone which connects to the network no problem. As does my laptop etc
To try to fix this I deleted all my new apps, especially the push ones which give me news updates, etc but this has made no difference.
The weird thing is if I turn off my router's security then the phone will connect and works perfectly fine. I've tried using all the different security settings (even WPS) with new passwords etc and everything seems to setup fine on the phone except it just doesn't want to connect (or more accurately stays connected for a microsecond).
If I go back to an open network it connects immediately and stays connected.
I think this is the root cause of the wifi connection problems that many other people are getting. But I'm at a loss to try to understand why it won't pick up a secure network but works fine otherwise.
My phone is using 2.2.1 and has been rooted
Any thoughts?

I think this is the root cause of the wifi connection problems that many other people are getting. But I'm at a loss to try to understand why it won't pick up a secure network but works fine otherwise.
My phone is using 2.2.1 and has been rooted
Root the problem highly unlikely ..
Secure home network test .
Remove security from Router that is no password .
Remove that connection from phone .
Reboot phone let it pick up router and connect .
If it does then delete reset router password and add in phone .
jje

Thanks for suggested fix. I'll give it a go and let you know if it worked.
Root was a bad choice of word..... I meant that while looking for a solution to my wifi problem I noticed many other people complaining that they can't connect to a wifi network for one reason or another and I was thinking that maybe broken security is a common cause of many wifi connection issues.. In my case there was nothing physical at all to suggest that security was an issue, especially since all my other devices work fine on the same network.
Cheers

Hi, tried your suggestion but I still cant connect. The first time I rebooted the phone it knocked out my internet connection! I've setup a static IP address for my PC and the phone was insisting on trying to connect using the same address and creating a conflict. I fixed that so that's not the issue.
This is what I've tried..
I checked to make sure DHCP was enabled in the router, rebooted everything. No luck.
I tried adding an IP Address Reservation for the phone and assigning a dedicated static IP Address. No luck either
I tried connecting the device using WPS. It all went as it should - my router saw the device, added the mac address to the list of devices etc. The phone acknowledged the handshake. But again it still wont connect.
I checked the router log and it says "DHCP IP: (192.168.1.2)] to MAC address B4:07:F9:336:3D, Tuesday, May 24,2011 03:08:48" which I think is what it should say.
OK I've just fixed it!!! Or at least its connected.
All along I've been securing the network with WPA2-PSK. I just changed it to WEP and the phone connected immediately. I hadn't considered WEP because I read that its not that secure and I do all my banking etc through my PC.
I've tried all the other security options and only WEP works with the phone. I suspect its a compatibility problem between the phone and my router (a Netgear WNT834B v2) because both the phone and router work independently but not very well together. There's plenty of posts discussing the Galaxy S connecting to WPA networks so it can do it.
Now, after trying all the other security options. It won't connect again even on WEP. Bummer. It is acting slightly differently in that its trying to acquire an IP address instead of simply not connecting, although it doesn't seem to be able to find one.
I need to try this on a friends network and see if the router or the phone is to blame. I've no idea... but the phone's a bit too touchy for my liking

I had a similar issue, I had to reflash the ROM to get it to work. Backup all your contacts and stuff and then do a full factory resetting. See if that helps, if it doesnt, reflash the ROM. It should work.

Well I've spent the last few days looking into this issue and it's considerably more widespread than I first realised. The problem is that while many people have a wifi connection issue we all seem to have variations on a theme.
As I say in my case the phone will connect and stay connected to an open network but won't touch a secure one. I tried many suggested fixes and nothing's worked so I am now trying a factory reset.
A couple of questions: there appears to be two ways to do this, a factory data reset through the phone menu; and a hard reset using a combination of volume buttons, etc. The hard reset seems to be the deeper of the two.
When you say full factory setting which one did you mean? I am currently data resetting and therefore using the "authorised" Samsung reset
But how long does this process take? My phone has had a black screen and been vibrating every 10 seconds or so for the last hour. It's getting quite hot and there appears to be no end in sight. Has the phone hung or something? If it has how do I get out of this without bricking the phone? It's beginning to concern me because I'll have to do something real soon.
As an aside, in my search for a solution I found something that might help someone people (it didn't work for me). According to the bloke who posted it, the problem for everyone is that the wifi drivers have not been installed properly and if you enter *#*#526#*#* on your keypad it unlocks a service access that reinstalls the wifi driver. I tried it and the phone told me the software was installed successfully but no change.

Waited long enough so pulled the battery out and restarted the phone. I get the startup screen but after that the screen goes black and it vibrates again every ten secs and I can't get in.
Have to try the other reset.....
Things are going from bad to worse..

Have managed to start a full factory reset using the volume, power and home button but it's gone back into the black screen and vibrating every ten seconds.
I know Im going off topic here but Ive now reset the phone, wiped the cache, tried to apply the sd card update (aborted because it can't find the directory) and it always comes back to the black screen and vibrating every ten secs.
Am now trying to reflash the rom. Oden reports that the flash was successful but the phone wont reboot. I tried a couple of times - one with Re-Partion checked and the other unchecked but neither will reboot. What could be causing that? I somehow remember that my firmware was JPH but I could only get hold of JPK. Could that be the cause?

I seem to have solved all the issues at last. Thought it was going to be a bit over my head for a spell.
Once I discovered that the only way I was going to get into my phone was by flashing the rom the first problem I came across was I didn't know which firmware my phone was using previously, apart from the fact it was 2.2.1 and from Asia. I guessed wrongly and after "successfully" flashing the phone it wouldn't reboot. I then noticed that there were only three variations of the 2.2.1 firmware for my region. The second one I tried went a little further than the first but I got an error message about the SD card. The third one installed no problem.
So I instantly checked the wifi signal and the phone connected to the secured network. And stays connected - so far about an hour and a half.
It's amazing how the phone deteriorated the way it did. Hope it doesn't do it again.
Thanks for any help/suggestions

Wifi issues after fresh install of new ROM

So my wifi will see networks, try and connect, then instantly disconnect and repeat. This problem has occurred for the last two roms that I installed. I don't think it is a problem with the rom because one, I havnt read so anywhere, two, i have tried installing and reinstalling and reinstalling again many many times. When I install a new rom, I always factory wipe, cache wipe, and dalvik wipe.
I am currently on Apex latest rom.
Has anyone else had this issue or know how to fix it? It is driving me crazy not having wifi!

EDIT
so it seems by toggling airplane mode on n off, the problem has been fixed. sorry for making this thread

so i thought airplane mode works, but it only did for a lil then keeps messing up. can anyone help please?

turbomalum said:
so i thought airplane mode works, but it only did for a lil then keeps messing up. can anyone help please?
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Don't know if this will work for you or not. Some have had success...
Go into WiFi settings and 'forget' your network(s), then reset your router/switch and then turn your WiFi back on. Sometimes it will reestablish with the right permissions.

ya i have tried that too. i don't understand what the problem is. I'm bout to just give up

turbomalum said:
ya i have tried that too. i don't understand what the problem is. I'm bout to just give up
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My problem is similar, it sees my home network and connects (and stays connected), but when I try to access the internet or markets, it says network error and won't let me connect. When I switch back to 3g and WiFi off, now I can hook up to internet and markets.
I'm checking into my wireless router. It might be the problem, tho my wife's computer is hooked up wirelessly and it seems fine, no problems, so idk.