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Hey world,
I'm having trouble with my Roger's branded Samsung Captivate SGH i-896's wifi. The phone is completely stock. When I connect to my wireless AP at home it doesn't seem to always work on the captivate... I had a htc magic before running all sorts of different roms and never had a problem like this before.
What happens is that I would connect to wifi at home and it would work, but if I leave wifi on the phone for an extended period of time and go back to the phone, wifi stops working.
It would show that i've successfully connected to my AP but no data would pass through my phone.
Disconnecting and reconnecting to the AP doesn't seem to work, the only way to fix it is to restart the phone. I'm not experiencing this problem with any of my laptops, netbooks or cellphones at home.
Security type is WPA2.
Is anyone else experiencing this problem? Anyone have an idea what could be causing this problem?
I have had this problem intermittently, So has my wife on her Captivate. No idea what causes it though. It's a pain because if WiFi is on, but not working, 3G doesn't kick in so apps just don't work.
my wife's captivate has this issue as well (but I don't on my captivate). It will work for a short period and then stop. We have a fios wifi router, not sure if that matters at all.
restarting the router and/or phone usually fixes the problem
mine is a linksys... hrnnn
I'm having the same problem on my new Captivate. Tried it on several different networks with the same results (shows connected but no data will transmit) before I took it back to ATT. They scratched their collective heads and rebooted (powered down and removed battery), which is a temporary fix, but its been working for two days now and I turn off WiFi unless I know I'm in range of a working hot spot.
I was having this same problem until I set my wifi policy to never sleep, dont know if it is a fix for everyone but it definitely fixed my problem.
Sent from my SAMSUNG-SGH-I897 using XDA App
Glad to hear I'm not alone!
I've been fighting with this issue for over a week now, it suddenly started occurring. I wonder if it was an app we all loaded that suddenly made this condition occur? If you look the phone is requesting an IP and if the IP given back by the router is the same one it already has the phone doesn't acknowledge that command. If the router is rebooted then a new IP is given, or what is considers new. This is a HUGE problem and I've put in some time looking at it, but one of the problems is that is comes and goes. What your router log and you'll the phone request an IP over and over again, all the while the router saying "here, take the same one you already have back".
If you use the app "Network Info II" you'll see the problem when it displays a "Device IP" at the top of 192.168.1.254 and WiFi IP address will be the correct one, in my case 192.168.1.108. When we have these two IP numbers showing differently the device is hosed. Rebooting will put them back in sync, but that is not the proper solution, we need to get to the bottom of this! I understand the WiFi IP address showing at the bottom but the "Device IP" I do not, why the difference? How can we affect the "Device IP", where does the device get that IP address?
Try the app called WiFi Fixer. That did the trick for me. There seems to be a bug of some sort that causes the phone to not release the IP address. Or you could use static IP but that worked only for a while.
Cheers.
Sent from my SAMSUNG-SGH-I897 using XDA App
the app doesn't seem to work for me.... =(
DKirk said:
How can we affect the "Device IP", where does the device get that IP address?
Click to expand...
Click to collapse
The phone gets the device IP from either the service provider (when using edge/3g), or from the router (when using wifi). If an IP address is not provided, it uses a default IP address, which is always outside of the standard private IP block.
There are two ways to assign an IP address: dynamically and via static IP address. Dynamic = assigned by the router, static = pre-programmed by you. I don't know if you can set a static IP address on a phone, as I've never tried it.
I had a zyxel wireless n router in my house and could never get the wifi to work on my captivate. If it did work it lasted 5 seconds... I was really pissed.
I was thrilled to see that buffalo is now back in the market and with dd-wrt firmwares... So I picked up the most expensive one they had for $89.99.
it has a dlna client built in as well as bit torrent, also lets you use a spare usb hard drive as a nas... things i don't know....
However loaded up the wireless settings in 2 minutes and voila... perfectly working on my captivate... I have also found that this router works flawlessly with G+N devices and it is gigabit. I was able to stream 1080p video from my synology 411+ to my ps3, download on the captivate and be on two other laptops at the same time without any issues... I am very very impressed with the buffalo.
Here is the product info.
buffalo nfiniti wireless n high power router and access point. WZR-HP-G300NH
ohh and my laptops are connected fully at 300 mbps with this router wirelessly...
very very happy with it.... Oh and forgot to mention... once this started working with the buffalo i noticed my batter was much better running on wifi all the time. Also wifi file explorer pro works flawlessly.. I was able to upload a 700 meg movie to my captivate wirelessly in about 2 minutes.
WiFi fixer did not fix my problem as well. After turning WiFi on the device IP remains 192.168.1.254 while the WiFi IP is correctly set at 192.168.1.108. When these two IPs are different WiFi does not work and WiFi Fixer doesn't appear to see any problems here.
The router here is an Asus RT-N16 running Tomato and I'm fairly confident that isn't the problem. This is more like an internal routing issue inside the phone.
I don't think it's brand of router that matters... maybe a setting on our routers can fix this...?
I've searched the internet to find a sol'n but it looks like this wifi problem is a widespread problem for almost all galaxy S devices... ppl have made temporary workarounds (ie. setting a static ip) but ultimately, there is no fix for this problem.... gg...
bigbrotherbear said:
I've searched the internet to find a sol'n but it looks like this wifi problem is a widespread problem for almost all galaxy S devices
Click to expand...
Click to collapse
It appears to go beyond Samsung Galaxy, I've seen the same issue with Nexus and Motorola Droids. VERY frustrating!
tylerdurdin said:
I was having this same problem until I set my wifi policy to never sleep, dont know if it is a fix for everyone but it definitely fixed my problem.
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
I dont know why nobody even notice that answer !!!!
had same problem on my milestone .. it is not a bug , wifi goes to sleep , its the way your phone is set up ... as its quoted here set it to never sleep and make sure your not using soem kind of app that will overwrite that setting ( like battery manager that for example could turn off wifi to save battery)
very easy to double check once your wifi is not working , go in wifi settings scan and check the wifi access points you normally use you ll see its set to disabled ..
the bug is it doesnt resume like it should. or gets re-enabled however you wanna call it . just re-enable it voila ! no reboot needed .
I got it working!!
This may be my first post here, so be kind...
Running Cognition v2.3b3 and Linksys WRT54G router. WIFI was working fine until I flashed to Cog 2.2 Then I could only use WIFI tethering, no other WIFI connection would work.
I tried setting up static IP and setting sleep to never. Didn't work. Changed router security from WEP to WPA Personal and got it working.
Phone settings: Go to Wi-Fi Settings, click menu, and goto advanced. I don't know if all the settings here are necessary, but I'll post what I have.
Port = 80
Use statis IP = checked
IP address = 192.168.1.103 (check your router assignments for an open address)
Gateway = 192.168.1.1
Netmask = 255.255.255.0
DNS 1 = (check your router config. For my router it's located under the Status, then router tabs.)
Router settings: (Under the Wireless, Wireless Security tab)
Security Mode = WPA Personal
WPA Algorithms = TKIP
WPA Shared Key = (your access key used when you attempt to athenticate from your phone)
Group Key Renewal = 3600 seconds
Write the access key down so you can use it to reconfigure the other wireless devices on your home network.
Good luck,
Glen
changing my router fixed the issue.
I have wifi running on my captivate for 8 hours at a time at work now and at home. Not one hiccup or disconnect, works 100%.
99% of wireless routers are crap. I work in IT and have dealt with most major brands and had been running linksys wireless routers with dd-wrt on them...
if you got a spare 90 bucks.. go to your microcenter or place where they sell buffalo routers and pick one up. If it doesn't work.. you can return it.
This worked for me
Going to a static IP worked for a few hours and then it stopped working as before. WiFi is set to not sleep.
When I ran the router without security I did not have this problem and since adding WPA2 w/AES+TKIP the problem has developed. The iPod Touch doesn't have a problem with it, nor my laptop or wireless ipTV set-top box, only the Android. I'm leaning towards setting up another router without security, on a different channel, and see if the problem disappears again. Here in 2010 we shouldn't be having this issue, but look on other forums and you'll find similar complaints with other brands of Android phones, it's not a Samsung thing.
Need a little help. My G-tab is running current VEGAn-TAB rom. I am having problems getting the wifi to actually connect. My icon shows a good signal, and inside the wireless settings I am showing connected to my wireless network. I also went to advance settings and made sure wifi never sleeps. All apps that need internet connection (market, browser, etc.) show no data connection.
Used yesterday with no problems. My laptop is running on same network and working fine.
Any ideas?
have you restarted? Sometimes happens to me too but it's nothing a simple restart can't fix.
Yes. Restarted several times. Didn't work.
Oddly enough I have a Airave from Sprint to boost my cell phone signal, and it may have been the problem. When I unplugged it and returned to my G-Tab later the Wifi was working. Not sure why.
TexasZac said:
Yes. Restarted several times. Didn't work.
Oddly enough I have a Airave from Sprint to boost my cell phone signal, and it may have been the problem. When I unplugged it and returned to my G-Tab later the Wifi was working. Not sure why.
Click to expand...
Click to collapse
Could be competition on the 2.4 GHz frequencies. Some wireless phones and even microwave ovens can trash a wifi connection.
Moved to general
Anyone else having WiFi problems with Vegan? Since installing this mod, I can only connect to a WEP signal and not a WPA-secured network.
I can't connect either. Trying to connect to a wep wifi and it stays on "obtaining ip address from ..." but never completes the connection. Any help?
LittleBirds said:
Anyone else having WiFi problems with Vegan? Since installing this mod, I can only connect to a WEP signal and not a WPA-secured network.
Click to expand...
Click to collapse
No problems with home WEP, office WPA2-PSK and several wide open public ones. I just wish the damn thing would auto-connect to the ones I have been to before.
outofoffice said:
I can't connect either. Trying to connect to a wep wifi and it stays on "obtaining ip address from ..." but never completes the connection. Any help?
Click to expand...
Click to collapse
My only guess is, if its a 5Ghz N Router you should check to see if it allows
2.4Ghz signals and not just 5Ghz. The GTAB doesn't seem to support connections at 5Ghz.
I just changed over from TNT Lite(latest version) and was able to connect fine but I didn't like the interface and some of the features. I've loaded Vegan tab 7.0.0 and I was able to connect at work (802.1 EAP) network but I can't connect to a wep wifi at home (were several other pc's are connected and working fine) and it stays on "obtaining ip address from ..." but never completes the connection. Any help?
I have a Linksys wrt300n router and have confirmed that it configured to accept 2.4Ghz & 5Ghz signal and have rebooted several times with no luck.
I don't have a lot to add to help you troubleshoot, but I can say that I am running VEGAn Gingerbread RC1 with pershoot's latest kernel. I am able to connect at home on a WAP2-PSK (Linksys Linux based G/N) at home, WAP2-PSK at the cabin (Linksys's cheapest G/N), and at work on a 802.1 EAP network (Cisco).
I has some unexplained issue mounting the internal storage on a computer. After a little head scratching, I started to wonder if it had something to do with the custom kernel I was running. I flashed Pershoot's latest kernel and my problems went away.
I mention all that to suggest that you might try flashing a different kernel and see if you get different results.
I have an issue with vegan where when i reboot the device (or turn off and turn on) wifi is off even if left on when turning off, i have to manually turn on wifi after every boot.
Sent from my DROIDX using XDA Premium App
fajordan said:
I just changed over from TNT Lite(latest version) and was able to connect fine but I didn't like the interface and some of the features. I've loaded Vegan tab 7.0.0 and I was able to connect at work (802.1 EAP) network but I can't connect to a wep wifi at home (were several other pc's are connected and working fine) and it stays on "obtaining ip address from ..." but never completes the connection. Any help?
I have a Linksys wrt300n router and have confirmed that it configured to accept 2.4Ghz & 5Ghz signal and have rebooted several times with no luck.
Click to expand...
Click to collapse
Have you checked to see if you're using MAC address filtering, and if so, that your gTab's MAC address has been added to the whitelist on the router? I get the feeling that that may be the issue. You have the WEP key on your device, but your router's still blocking it. I'm running the same ROM you are, and have had absolutely no troubles connecting to my work network with 802.1 PEAP, WPA/WPA2-TKIP and AES at home, and multiple makes/models of access points/routers.
Hmmm. Just reread your original. Now I'm wondering if you have enough DHCP leases available on your router. If you're out, you'll have to wait until a lease expires or add some more to your scope of addresses.
Hope some of that helped in some way...
First of all may I say I have searched for this problem on google, as well as xda forum. I did find several threads about this problem, but none of the solutions presented appear to be my case.
So, basically the problem is: I cannot connect to my home router, a Linksys WRT300N N-router. I could not connect with a N1, HTC Desire, nor with my actual NS. My previous Galaxy S was connecting fine though. I'm talking here about stock ROM, no rooting, no custom kernel etc. Also, using static IP address works like a charm, but then WiFi cannot be used on other outside routers, since Static Ip setting is not setup PER router, but rather per WiFi connection, meaning the phone will try to use the static IP defined for any WiFi I run into.
From My experience, it seems it could be related to wireless N router as opposed to b/g. This happened since I replaced my router with the actual one. Ever since this happened, my phone would not connect to my router. Also, this problem seems to be presentfor any N-router, since I cannot connect to WiFi in other locations as well (which might have N-routers as well).
Assuming that it is a problem with N-routers, I don't understand why the Galaxy S would connect, but NS not, since they are almost the same hw.
Does anyone have a clue on this? But please skip solutions like reset router, reset phone, reset modem, use different ROM etc. I am talking stock ROM for all the examples above.
Thanks.
I use my NS with three 802.11N routers without issue (D-Link, Belkin and Netgear).
Have you checked if MAC filtering on the router is active? What security mode are you using? Who makes yr router and does it have latest fw?
Sent from my Nexus S using XDA App
Just seen you use Linksys, I have a wag160n and I find it unsusable on terms of wifi, dreadful hardware, despite the parent company being Cisco
Check Linksys forums for problems.
Try another router for whether it's that or phone at fault.
Sent from my Nexus S using XDA App
MikhailCompo said:
I use my NS with three 802.11N routers without issue (D-Link, Belkin and Netgear).
Have you checked if MAC filtering on the router is active? What security mode are you using? Who makes yr router and does it have latest fw?
Sent from my Nexus S using XDA App
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Click to collapse
MAC filtering is disabled, I've checked it. Security is, on the router, PSK-Personal with TKIP encryption. Key renewal: 7200 sec. Not sure if this can influence anything.
I've checked on linksys page for fw upgrade, they only have pdf manuals.
ionutz6 said:
First of all may I say I have searched for this problem on google, as well as xda forum. I did find several threads about this problem, but none of the solutions presented appear to be my case.
So, basically the problem is: I cannot connect to my home router, a Linksys WRT300N N-router. I could not connect with a N1, HTC Desire, nor with my actual NS. My previous Galaxy S was connecting fine though. I'm talking here about stock ROM, no rooting, no custom kernel etc. Also, using static IP address works like a charm, but then WiFi cannot be used on other outside routers, since Static Ip setting is not setup PER router, but rather per WiFi connection, meaning the phone will try to use the static IP defined for any WiFi I run into.
From My experience, it seems it could be related to wireless N router as opposed to b/g. This happened since I replaced my router with the actual one. Ever since this happened, my phone would not connect to my router. Also, this problem seems to be presentfor any N-router, since I cannot connect to WiFi in other locations as well (which might have N-routers as well).
Assuming that it is a problem with N-routers, I don't understand why the Galaxy S would connect, but NS not, since they are almost the same hw.
Does anyone have a clue on this? But please skip solutions like reset router, reset phone, reset modem, use different ROM etc. I am talking stock ROM for all the examples above.
Thanks.
Click to expand...
Click to collapse
Have you checked that you set up the router with b/g/n protocols? not only N..
Try to change the password encrypting method, to WPA or WPA2 or WEP, try also to change the default password.
Have you tried to disable the firewall (DMZ)?
I have exactly the same issue on my stock Desire.....
I have recently upgraded my router from a Belkin G+ to a Belkin N+ and using the b/g/n setting the desire WILL see the connection but will NOT connect to it, NO MATTER WHAT settings you try. Changing it to b/g and it will connect without any issues.
It is my understanding that the Desire/Nexus et al doesnt have the access to the N ability enabled (it has the correct chipset but for some reason it is not active).
Maybe when broadcasting the tri-band the chipset only sees the stronger N connection, therefore tries to connect but gets conflicted (due to lack of N firmware) and instead of switching to b/g it just loops to the stronger signal. IF that makes any sense
Riki1kenobi said:
I have exactly the same issue on my stock Desire.....
I have recently upgraded my router from a Belkin G+ to a Belkin N+ and using the b/g/n setting the desire WILL see the connection but will NOT connect to it, NO MATTER WHAT settings you try. Changing it to b/g and it will connect without any issues.
It is my understanding that the Desire/Nexus et al doesnt have the access to the N ability enabled (it has the correct chipset but for some reason it is not active).
Maybe when broadcasting the tri-band the chipset only sees the stronger N connection, therefore tries to connect but gets conflicted (due to lack of N firmware) and instead of switching to b/g it just loops to the stronger signal. IF that makes any sense
Click to expand...
Click to collapse
Well, the funny part is that I don't even know how to disable the N range to my Linksys 300N.
Anyway, it is weird that the Samsung Galaxy S had no issues with this, while Nexus S (still Samsung made, brother-in-law to SGS) has this issue. For HTC, all have had this problem, including Desire, Desire HD, Wildfire.
Still no explanation or resolution to this matter.
I may have fixed this issue (well I have for me anyway, so yay).
After posting this I decided to apply some weird logic to it. So I reset the router back to b/g, to do this you need to log into the router IP settings, for Belkin it is 192.168.2.1. On linksys routers I think it is 192.168.1.1 but check to be sure.
Once you are logged in there you can change the broadcast settings from N, b/g/n or b/g etc.
Okay, so here is what I did. I reset the router to broadcast b/g only, my Desire would connect. So I decided to try resetting the router to broadcast b/g/n (because I use N on other devices) and then switched the wifi on the desire off and back on again. Low and behold it connects.......Tried it loads of times now and connects everytime!
Might be worth a try?
You guys should just check the logs on the router and see what they say. Should give you a much better idea of what the issue is. You can then Google the error line.
Mine is fixed now, been connecting to various N routers with NO probs since I did the workaround.
My guess would be a protocol conflict (wireless handshake if you prefer) when N routers are broadcasting (based on the fact that the Desire/Nexus etc dont have N protocol enabled in the chipset firmware).
To get around the conflict connect to an N router using the b/g only setting in the routers IP settings and then check you can connect okay and switch the b/g/n back on in the router. I've done this twice today (different N routers, a Linksys and a D-Link) and it works on both where it wouldnt before, so it wasnt just my router.
hum... i am having the exact same problem as described only my router is already using
802.11g&802.11b
i have no idea why it keeps trying to obtain ip address
then it scans agains because it can't connect and tries to obtain the ip again
after trying for a minute or 2, the home ssid becomes:
"disabled, secured with..."
(device = motorola atrix)
I have tried everything and still not working... do routers block Mac addresses if it doesn't connect right away?
Sent from my MB860 using XDA App
Did you reboot your router? Mine does that sometimes but a reboot always fixes it.
Sent from my Nexus S using XDA App
Hum. Tried restarting the router... no go
Sent from my MB860 using XDA App
My hp touchpad is not connecting to my home wifi network, I have tried very many places and my touchpad connects to wifi but at my own home wifi it simply does want to connect to wifi. I did a hard reset and nothing works any ideas?
What kind of router? How is your network set up? Open, WEP, WPA or Enterprise?
nunjabusiness said:
What kind of router? How is your network set up? Open, WEP, WPA or Enterprise?
Click to expand...
Click to collapse
it is a wep, netgear router
Make sure your router has the latest firmware available, then power cycle it and try connecting with the TP again.
Might need to change it to WPA for it to work.
Coincidentally, mine wont connect to my netgear router for wireless N - sees it, but won't connect to it regardless of settings, connects instantly using G.....
nunjabusiness said:
Make sure your router has the latest firmware available, then power cycle it and try connecting with the TP again.
Click to expand...
Click to collapse
i'll will give it try and hope it works
Furbious said:
Might need to change it to WPA for it to work.
Coincidentally, mine wont connect to my netgear router for wireless N - sees it, but won't connect to it regardless of settings, connects instantly using G.....
Click to expand...
Click to collapse
I will try this also, thanks for the advice
Hi,
I have a problem with the wifi on my Samsung Galaxy S2 after I changed some settings on my home router. The wifi works anywhere else, just not at home.
What I changed was the router ip and wireless channel. Since then I have cleared all the wireless and browser settings in the phone and reverted back to the old settings on the router. Still doesn't work.
I've also tried having static IP. It doesn't work as well. It's only the internet. It connects to the router fine and I haven't had any problems with other gadgets and computers connecting.
Your tried turning on airplane mode for a few then reboot?
Your router doesn't have a sync button does it?
*signed
One thing you can do is delete the connection to your router on your phone, and connect again with new password from router. Do you have any other device beside your phone connecting to this router? If no, you need to test it. If yes and not connecting check the connection security, like wpa or wpa2. If all fail, reset router. This mean you will need to reconfigure your router. Check manual for more on your router.
Sent from my SGH-T989 using xda premium
Yes. View available wireless connections. Click your router. Then click "forget".
Then view again, click your router, and type the passphrase.
mrrick said:
Your tried turning on airplane mode for a few then reboot?
Your router doesn't have a sync button does it?
*signed
Click to expand...
Click to collapse
Just tried this and it didn't work.
My router is a cheap basic router that came from my internet provider. No such thing on it.
85gallon said:
Yes. View available wireless connections. Click your router. Then click "forget".
Then view again, click your router, and type the passphrase.
Click to expand...
Click to collapse
I've already reset anything wifi related on my phone. It hasn't worked.
Do you have something else that you can connect to wifi to see if the problem is your router?
85gallon said:
Do you have something else that you can connect to wifi to see if the problem is your router?
Click to expand...
Click to collapse
Not in my home no. But like I said in the OP, the wifi on my phone works fine in other houses and hotspots. It's most definitely some kind of communication problem between my router and phone only but I'm not familiar enough with routers to know the problem and I haven't stumbled on anyone else on google having the same problem.
Two laptops, one Win7 and one OsX, are connected. Unfortunately I'm new in the area I live in and my girlfriend doesn't have a smartphone so I haven't been able to test if it's just my phone or just android or iPhones in general.
I can't think of a logical reason why it's like this
Maybe router is configured with wifi 802.11n and the galaxy only runs on b/g ?
If you're using WPA/WPA2 security, check that the
router is set to use AES encryption.
If you think you did your best. Its better to buy a new router then. )
maybe you could try unplugging your router?
Freestate said:
Maybe router is configured with wifi 802.11n and the galaxy only runs on b/g ?
Click to expand...
Click to collapse
I didn't change any of that. It's got a WEP encryption only as well.