[Q] No WiFi after upgrade to ICS - Galaxy S II Q&A, Help & Troubleshooting

Have flashed 3 different ICS ROMs and I can't connect to my wifi at all. All SSIDs in the area show fine, mine with "Excellent" signal strength. I add my WPA key and it goes through to authentication. At that point it says "Saved" then back to authenticating then back to "saved" and so on. After a minute or so it says that the "poor" connection will be ignored. The WiFi connected icon never shows in the status bar.
Have tried reflashing, fixing permissions, the WiFi fixer app etc. Static IP doesn't help although I notice that if I do change IP it is back to 192.168.1.128 when I go back to it. All works fine as usual when I restore back to Gingerbread.
Any ideas?
EDIT: Think I've sorted this. Installed 02 official ROM and the issue persisted. I changed the "Network prefix length" setting to 32 which forced the IP address to "::1" which showed up when the WiFi finally connected. Then went back to settings and changed to my actual IP and the "length" setting back to 24. Also updated DNS settings. Finally all stuck and WiFi is solid as a rock. Now to try with custom ROM.
Thanks.

Related

[Q] Cisco WRT320N Disconnected Problem

So here is one to ponder... #MyStreak doesn't automatically connect to my home wifi. It appears to only be my home wifi. Advanced settings > WiFi Sleep Policy is set to Never. It comes up and says Disconnected. Pre-StreakDroid 1.6 I had to toggle the wifi on and off several times, most of the time it would just get stuck "Obtaining IP Address". 1.6 and the new AMS seems to have fixed that, but it still doesn't auto-reconnect to my home wifi... Typical senario, I'm at home and connected to wifi, leave to go to the store for milk, come back home, wifi disconnected. Weird yes? Cisco WRT320N.
http://www.youtube.com/watch?v=jjysx1kmudM
The fix is to replace /system/bin/dhcpcd with version 4.0.1 from this post:
http://forum.xda-developers.com/showthread.php?t=907772

[Q] No Wifi after Wifi Analyzer...

Hey guys,
I have a problem with my wifi...
Here is the before: Wifi works about 70% of the time, occasionally the connection would be dropped (as in "no network access", it still said it was connected).
Here is what then happened (in that order): Wanted to find a less crowded channel and installed Wifi Analyzer. Quickly decided that Channel 1 would be cool, browsed to the router configuration on the Desktop machine (LAN connection), changed the channel. Back to home on Android (don't remember whether via the home or back button). Into settings to see whether I would have to rescan or whether it would pick up the change of channel itself. It couldn't connect... It scans and attempts to connect, but doesn't
What I tried:
I restarted the Galaxy. Still couldn't connect.
Deleted the connection and re-entered the passphrase. Still couldn't connect.
Uninstalled Wifi Analyzer. Still couldn't connect.
Restarted device again. Still couldn't connect.
(At some point during all this, probably quite early, the Wifi symbol also stopped showing up in the status bar. Doesn't appear no matter whether Wifi is on or off)
Switched back to the channel I came from. To no avail
Switched of encryption on the Wifi. Still to no avail
Any ideas as to what might have happened and, more importantly, how to fix it? As I said the connection itself has never been the most reliable, but this is a different league
Thank you everyone!
Sandro
If you haven't tried it yet, reset your router. That fixes the majority of Wi-Fi issues out there. If that doesn't work, it may be your router itself. Certain routers have more issues with mobile phones than others.
You may want to go to a friends house and try connecting to his router and see if you can troubleshoot and isolate the issue. Either way, best of luck...
Sent from my GT-I9000 using xda premium
Damn you sitecom router!!!
Alright, one thing I hadn't tried until now was to restart the router. That fixed everything including (for whatever reason) the lack of the Wifi symbol!!
So if that is possible feel free to delete this thread! I didn't find the option anywhere...
Sorry for the unjustified disturbance
Sandro

Broke Wifi TouchPad 16GB

Is anyone else experiencing the wifi settings to crash? My wifi works fine for a few minutes but suddenly I lose signal and when I go to wireless and network settings, it crashes and I am out of signal. Anyone know of a solution for this?
Thanks!
Have you tried Regpon?
Also, I've had success with this simple task:
In Wi-Fi settings, "forget" the router you're trying to connect to. Then shut off Wi-Fi.
Wait 10 seconds or so then turn Wi-Fi back on.
I found this workaround when searching for Wi-Fi problems on this board. No problems, now. If you get a FC for Settings, select "wait" until you've successfully gotten the settings to "forget" the connection and until you've got Wi-Fi shut down.
thepza said:
Have you tried Regpon?
Also, I've had success with this simple task:
In Wi-Fi settings, "forget" the router you're trying to connect to. Then shut off Wi-Fi.
Wait 10 seconds or so then turn Wi-Fi back on.
I found this workaround when searching for Wi-Fi problems on this board. No problems, now. If you get a FC for Settings, select "wait" until you've successfully gotten the settings to "forget" the connection and until you've got Wi-Fi shut down.
Click to expand...
Click to collapse
I tried this but still continues =/
In my case I tried to "forget" the WIFI password setting to access to the router, and restart your touchpad, and when finished booting the WIFI is back to normal then
The only inconvenient thing is you have to "forget" the password every time you shutdown or restart your touchpad.....
I think the reason for this wifi problem is that wifi's channel cannot be set up normal, I have seen it in my advanced setting of wifi, there are only three channels available for me to choose, which are 11 12 and 14.......
Also make sure you have your date, time and time zone set in settings.

[Q] WiFi - won't connect to a Netgear Powerline Adapter

I have had a Netgear Powerline Adapter system set up in my Bedroom (XAVNB2001) for the past year and a half, because the signal from my Cisco E4200 doesn't effectively reach up there. It has its own SSID, on the 2.4GHz band. It has been completely solid and reliable, and I use it all the time with my Verizon Samasung Galaxy Nexus (stock ROM 4.2.2), and Asus Infinity Tablet (stock ROM 4.2.1). My wife also used it without problem with her prior Motorola Droid 3.
But for reasons I can't identify, my wife's new Galaxy S4 won't connect to it. Also Stock ROM 4.2.2. Her phone sees the Adapter/SSID, and shows a strong signal when we're up there. I enter the passcode with the same encryption (WPA/WPA2 PSK) as I have on the other working devices, and it quickly goes to "Acquiring IP" but this never completes. It tries a couple of times, and usually ends up saying: "Network Disabled Because Internet Connection Is Slow." But it is not slow - works as fast with the other devices as when I'm connected to the Cisco downstairs near the Router. I have carefully entered the passcode (checking the box to show the characters to make sure I'm not putting in a typo) a dozen times.
There is no problem connecting her S4 to any other WiFi network we've encountered (to the Cisco downstairs directly, at my kids' houses, hotels, etc.).
I can't see any trouble-shooting steps to even identify the problem. Usually this is a no-brainer: you see the SSID, enter the passcode, and you're in. What could possibly be the problem here??
DLCPhoto said:
I have had a Netgear Powerline Adapter system set up in my Bedroom (XAVNB2001) for the past year and a half, because the signal from my Cisco E4200 doesn't effectively reach up there. It has its own SSID, on the 2.4GHz band. It has been completely solid and reliable, and I use it all the time with my Verizon Samasung Galaxy Nexus (stock ROM 4.2.2), and Asus Infinity Tablet (stock ROM 4.2.1). My wife also used it without problem with her prior Motorola Droid 3.
But for reasons I can't identify, my wife's new Galaxy S4 won't connect to it. Also Stock ROM 4.2.2. Her phone sees the Adapter/SSID, and shows a strong signal when we're up there. I enter the passcode with the same encryption (WPA/WPA2 PSK) as I have on the other working devices, and it quickly goes to "Acquiring IP" but this never completes. It tries a couple of times, and usually ends up saying: "Network Disabled Because Internet Connection Is Slow." But it is not slow - works as fast with the other devices as when I'm connected to the Cisco downstairs near the Router. I have carefully entered the passcode (checking the box to show the characters to make sure I'm not putting in a typo) a dozen times.
There is no problem connecting her S4 to any other WiFi network we've encountered (to the Cisco downstairs directly, at my kids' houses, hotels, etc.).
I can't see any trouble-shooting steps to even identify the problem. Usually this is a no-brainer: you see the SSID, enter the passcode, and you're in. What could possibly be the problem here??
Click to expand...
Click to collapse
You could try creating a static IP address using the MAC of the GS4 on your Cisco router. It sounds like it's authenticating, but unable to assign an IP for whatever reason.
Disable WiFi Multimedia (WMM) or the equivalent... BOOM! should work fine.
Also, if it's a MAC filter issue turn your MAC filtering off. If that is the issue your GS4 will connect instantly once MAC filtering is off.
Thanks for the replies.
I assigned a Static IP to the GS4 through the Router without difficulty. I then went to the GS4's settings for this SSID, changed it to Static IP, entered the assigned IP, kept the Gateway as 192.168.1.1, and changed the DNS settings to what is shown through IPCONFIG when I check my Desktop.
It now connected, but shows a DNS error when trying to go to a given website. So something funky is going on there. The phone shows a setting for "Network prefix length" and has a value of 24 - I've not encountered this before - should there be a different setting here?
There is no MAC filtering enabled, so that's ok.
"Disable WiFi Multimedia (WMM) or the equivalent" - where is this setting located? I don't see anything along those lines on the Phone, or in the Router's program??
DLCPhoto said:
Thanks for the replies.
I assigned a Static IP to the GS4 through the Router without difficulty. I then went to the GS4's settings for this SSID, changed it to Static IP, entered the assigned IP, kept the Gateway as 192.168.1.1, and changed the DNS settings to what is shown through IPCONFIG when I check my Desktop.
It now connected, but shows a DNS error when trying to go to a given website. So something funky is going on there. The phone shows a setting for "Network prefix length" and has a value of 24 - I've not encountered this before - should there be a different setting here?
There is no MAC filtering enabled, so that's ok.
"Disable WiFi Multimedia (WMM) or the equivalent" - where is this setting located? I don't see anything along those lines on the Phone, or in the Router's program??
Click to expand...
Click to collapse
I'm not sure about Eric214's suggestion, but it sounds like it could help. Regarding the static IP, if you set it on the router, the phone should pick it up automatically without you needing to enter it manually. After you set the static IP on the router, does the phone still hang on Acquiring IP? If you HAD to manually enter, you could plug in the DNS address coming straight from your router, or Google's open-dns of 8.8.4.4 and 8.8.8.8 (I think that still works.)
ttupa said:
I'm not sure about Eric214's suggestion, but it sounds like it could help. Regarding the static IP, if you set it on the router, the phone should pick it up automatically without you needing to enter it manually. After you set the static IP on the router, does the phone still hang on Acquiring IP? If you HAD to manually enter, you could plug in the DNS address coming straight from your router, or Google's open-dns of 8.8.4.4 and 8.8.8.8 (I think that still works.)
Click to expand...
Click to collapse
I tried it before, but tried it again - with the Static IP set up on the Router (using the "DHCP Reservation" option in the Router's program), and the Connection Settings on the GS4 for this SSID set to DHCP, all advanced settings at their default, it behaves the same way: Shows Acquiring IP, tries it twice, then shows the message I quoted above.
The Router remains set at Automatic Configuration/DHCP overall, with DHCP Reservation used to create a Static IP for this phone's MAC address. If this isn't the proper way to do this, let me know.
And with the Phone Settings for this SSID's WiFi set to Static IP, and the info entered as above, it quickly connects, but doesn't gain internet access.
It shouldn't be this hard. This is usually a no-brainer, as I first indicated. What is so different with this phone's WiFi setup??
I appreciate your input!
DLCPhoto said:
I tried it before, but tried it again - with the Static IP set up on the Router (using the "DHCP Reservation" option in the Router's program), and the Connection Settings on the GS4 for this SSID set to DHCP, all advanced settings at their default, it behaves the same way: Shows Acquiring IP, tries it twice, then shows the message I quoted above.
The Router remains set at Automatic Configuration/DHCP overall, with DHCP Reservation used to create a Static IP for this phone's MAC address. If this isn't the proper way to do this, let me know.
And with the Phone Settings for this SSID's WiFi set to Static IP, and the info entered as above, it quickly connects, but doesn't gain internet access.
It shouldn't be this hard. This is usually a no-brainer, as I first indicated. What is so different with this phone's WiFi setup??
I appreciate your input!
Click to expand...
Click to collapse
That sounds exactly right to me, and you're right that it shouldn't be that difficult. I've heard others report of miscellaneous routers that don't play nice with our phone. In this case, it's an AP, but that might still be the issue. I haven't personally experienced the problem, so hopefully someone else can chime in who has.
ttupa said:
That sounds exactly right to me, and you're right that it shouldn't be that difficult. I've heard others report of miscellaneous routers that don't play nice with our phone. In this case, it's an AP, but that might still be the issue. I haven't personally experienced the problem, so hopefully someone else can chime in who has.
Click to expand...
Click to collapse
Does anybody else have any ideas here?
I have also posted on Netgear and Verizon's forums, but am not expecting too much from either of these. I'm putting my money on the expertise here at XDA!
WMM is listed under the advanced settings of your router, it's not phone based but in your router. Disable it and return your other settings to normal and it should fix your problem.
Eric214 said:
WMM is listed under the advanced settings of your router, it's not phone based but in your router. Disable it and return your other settings to normal and it should fix your problem.
Click to expand...
Click to collapse
I'll have another look in the morning but earlier today I looked through every page of settings and didn't see anything that looked or sounded like this.
What section or function might you expect it to be found? What else might it be called?
Thanks.
Advanced settings in your router.
Basically, the 802.11n spec requires devices to support 802.11e (Quality of Service [QoS] enhancements for wireless LAN) in order to use HT (High Throughput) link rates, i.e. higher than 54 Mbps. (WMM is a subset of 802.11e that was created by the Wi-Fi Alliance as a stop-gap measure while 802.11e made its way slowly through the IEEE review process.)
The point is this is an issue for the GS4 as it's either firmware related or a Samsung issue they didn't realize they caused. Point being, if you have constant disconnects to your router, disabling WMM should make your connection "stick". At this point its what you may have to do until a firmware update for the router is released or Samsung releases an OTA update fix. Unless you're rolling 3+ devices at the same time streaming content you shouldn't have an issue running 54mbps. I stream full HD content to 2 devices at the same time with no lags or decompression issues at 54mbps.
As long as your phone has a static IP from the router there is no reason to set the DNS on the S4...the router does all the DNS routing for your devices. Hopefully that'll fix your DNS error issue.
Sent from my SCH-I545 using Tapatalk 2
OK - had another look at the Router settings, and found the WMM option in the QoS section. I somehow overlooked that yesterday. I'll try this out later today when I'm at home.
Eric214 - with respect to this WMM setting, I have a Panasonic SmartTV, and stream Netflix, Amazon Video, Vudu, etc. and can get the highest quality (1080p) through these. Is changing this setting going to impair throughput for this purpose?
chrishoyt2012 - after changing to Static IP, if I did nothing on the phone (that is, kept it at DHCP), it didn't fix the problem. I then selected Static IP on the phone, which necessitated inputting DNS. There were DNS server entries there by default, and these didn't work, so I manually changed them to my ISP's DNS that are used on my Desktop.
What should I be doing in this regard, other than what I have tried above?
Thanks!
Well, I disabled WMM Support, but nothing changed. It still failed to get an IP Address, same as I described in my original post.
No replies in the other forums either.
I'd really like to get this going - I'm also considering getting the S4, but this may cause some second thoughts...
I went into the Netgear Adapter's setup program, but couldn't fix the problem there either.
I tried different Channels, and a few other settings changes, but no joy.
There was a WMM setting there, but it was checked, and greyed out, so I couldn't try unchecking it even if I wanted to. I disabled WMM on the Router again, but this option remained unavailable on the Adapter's setup program.
I went into my Router, and deleted the IP address for the S4, to try and 'reset' it, but still no change. The S4 shows 'failed to acquire IP' every time.
Any other ideas?? I also tried my daughter's Razr HD, and it connected fine, just like the others. What is so different about the S4's WiFi connectivity??

V-10 WiFi not connecting

Hello,
I've had this problem for a while now, but it used to only apply to my schools wifi. After updating to Marshmallow it applies to every network.
When I try to connect to a wifi network the status changes to "connecting" and after a while it switches back to "saved" . When I try to connect again it doesn't do anything, the status remains "saved" , but the phone just won't connect to WiFi.
I've tried almost anything I could think of: static IP, resetting phone and router, turning on "use legacy DHCP client" (uses DHCP client from lolipop), a Factory reset, turning off "location" services and turning wifi on from airplane mode. The router's fine, no MAC-addresses have been blocked.
When I go to advanced wifi settings it does show the MAC address, but says "not available" for the IP. Even when I'm using a static IP the IP address won't show up in advanced wifi settings.
I really don't know what to do anymore, and was hoping someone here could help me. Any suggestions or help are more than welcome.

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