Develop Bugs

Won't connect to Cisco E4200 router with N only G!

Hi,
Just received my Galaxy Nexus earlier today and have been battling to have it attempt a connection to my WiFi router at home, it'll have a go at the neighbours routers but just says 'saved' on mine and never connects or fails regardless of password given or settings used.
Well - I just found the issue, if I set the E4200 to 'G' mode the phone connects perfectly, but it WILL NOT connect to the router set to 'N' speeds on 2.4 or 5GHz using 20 or 40 MHz channel width.
Anyone found there are potential issues with this phone and 'N' routers? I should mention I've tried 3 different kernels (stock, modaco and franco) and 3 different ROM's (4.0.1 stock, 4.0.2 Revolution HD and 4.0.3 build in the dev section) and all exhibit the same issue. Have not changed baseband as I'm using a 'T' model and want to keep my I9250TDVKK6 modem - this is probably where the problem is anyway.
Anyone else having similar or found a workaround or solution? Thanks!

Hi,
have you tried settings the MHZ band on auto or anything besides just 20mhz band? not many devices like this channel, I'm not having any trouble on the Aerohive system at work or other Netgear at home.

Thanks for the thought! 20 is standard but I've tried every setting - it will connect on 2.4GHz using 'G' fixed speed/protocol or 5GHz only using 'A', neither works at all on 'N' on any channel, width or security
It is bizarre, it's like the phone decides it won't try and says "saved" on the profile once the password is put in when its on "N" there is no connecting, authenticating or getting an IP feedback at all, it does nothing really. If I choose another working AP after trying an "N" one the "N" one says 'disabled'.
My SGS2 worked flawlessly and without complaint previously on any "N" or otherwise setting.

I have the same model router, and it is working for me. I have both the 2.4 and 5 ghz set to mixed network mode. Channel width set to auto, and security/encryption matching on both frequencies. On the Nexus, I have the 5 ghz specified in Wifi settings.
Sent from my Galaxy Nexus using xda premium

I have this model and connect via the 5ghz connection with no problems.

Same with E3000 with DD-WRT and Virginmedia Superhub
I've been suffering with this problem for a while now. I bought mine on the 19th Nov and tried it out in pure 5 Ghz mode almost straight away and was very impressed with the throughput from my 50Mb Virginmedia cable connection (40+Mb/s with Speedtest.net app).
All was well until I suddenly couldn't connect. It said the SSID was saved and the signal was excellent but tapping "connect" did nothing. I presumed my phone was acting a little screwy so did a had reset (stock unrooted 4.01F YAKU) and tried again but still suffered the same problem.
I started to suspect it could be a channel issue as the GN only supports a handful of 5Ghz channels, so set them accordingly in DD-WRT on my E3000...same result.
To rule out the router, I activated the 5Ghz wireless on my Virginmedia Superhub and what do you think happened?? Exactly the same as before. Everytime I tapped connect, there was no evidence of and attempt to connect to the network. I then tried the 5Ghz SSID on the E3000 and got the same result with the Superhub one dropping back to "disabled" as the OP noticed.
I'm trying to recall if the problem occured before or after the volume fix OTA but I can't really remember to be honest. I'm sterting to think that the handset is faulty as only a couple of people seem to be suffering with this issue...
---------- Post added at 09:50 PM ---------- Previous post was at 09:38 PM ----------
I Googled the issue again and discovered a post on Androids bug posting forum which seems to indicate it's a hardware fault:
http://code.google.com/p/android/issues/detail?id=23296
I think a trip back to Phones4U is in order for an exchange.

It's happened again!!
I have the same problem with the replacement handset as before. I had just been using 5Ghz, disconnected and when I tried to reconnect, it just sat there as if I hadn't selected "Connect". I've been looking around on various forums and I'm inclined to think that they just die after a while as there arer many other posts similar to this with lots of people trying saying the same as I (and the OP did). Mine has been fine for over 2 months and suddenly has ceased to work...Looks like a warranty replacement this time as P4U were kind enough to replace the handset in-store even though I was out of the 30 day exchange period as I had shown them this forum post indicating it was a known problem that other users were suffering...Technology always fails me in the end

..

Wi-Fi on the GN is horribly broken—you just need to accept it until the Android developers get their heads out their *sses and fix it. Using our Cisco enterprise-class access points, the GN cannot connect at 5GHz—though every other Wi-Fi device that supports 5GHz can. That said though, the GN CAN do 11n over 2.4GHz. Go into Settings, Wireless and Networks, Wi-Fi and tap on your SSID. This should show you your link speed and 72Mbps is as good as you’re going to get with a 20MHz channel and the GN hardware—mine shows 65Mbps and this is an 11n speed, albeit a slower one. From the configuration of our enterprise-class access points, 11g covers “6.0, 9.0, 12.0, 18.0, 24.0, 36.0, 48.0 and 54.0”—whereas 11n covers “m0-m15” (MCS index). The GN only supports m0-m7 and, currently, my GN is connecting at m6.
Hope this helps! At least a little.

No internet access after switching between Asus RT-AC66U and data

I have no internet access on one certain wifi router (asus rt-ac66u), with my n7 lte, although I can access the internet on other routers and through the dataa connection, I can access my router management though. I did a factory reset of the router and that solved the problem temporarily but the problem came back. Just switching router/tablet on/off doesn't solve the problem
edit: well after turning on/off the n7 wifi worked but now data doesn't work when I disable wifi

godutch said:
I have no internet access on one certain wifi router (asus rt-ac66u), with my n7 lte, although I can access the internet on other routers and through the dataa connection, I can access my router management though. I did a factory reset of the router and that solved the problem temporarily but the problem came back. Just switching router/tablet on/off doesn't solve the problem
edit: well after turning on/off the n7 wifi worked but now data doesn't work when I disable wifi
Click to expand...
Click to collapse
bumb

HELLLLLOOOOOO, is there anyone out there!?

godutch said:
I have no internet access on one certain wifi router (asus rt-ac66u), with my n7 lte, although I can access the internet on other routers and through the dataa connection, I can access my router management though. I did a factory reset of the router and that solved the problem temporarily but the problem came back. Just switching router/tablet on/off doesn't solve the problem
edit: well after turning on/off the n7 wifi worked but now data doesn't work when I disable wifi
Click to expand...
Click to collapse
Have you upgraded to version 3.0.0.4.374.979?
http://dlcdnet.asus.com/pub/ASUS/wireless/RT-AC66U/FW_RT_AC66U_3004374979.zip

godutch said:
I have no internet access on one certain wifi router (asus rt-ac66u), with my n7 lte, although I can access the internet on other routers and through the dataa connection, I can access my router management though. I did a factory reset of the router and that solved the problem temporarily but the problem came back. Just switching router/tablet on/off doesn't solve the problem
edit: well after turning on/off the n7 wifi worked but now data doesn't work when I disable wifi
Click to expand...
Click to collapse
If flashing the latest firmware doesn't help. You can try and change the wireless mode of your router. Log into mgmt. Navigate to your wireless settings, change "wireless mode" from "auto" to "N Only."
It's worth a try. What that will do is force N band only, whereas on auto when a g/b band connects the router switches to b/g mode, and that might mess with the Nexus. If the problem you encountered was fine with a factory reset temporarily, all it would take would be a "g or b" band device to log on to kill your n band and dumb down to g/b band.
It's not a bad idea if you don't have any b/g devices to turn off 'auto' anyways. The jury is still out on whether or not it actually benefits an all "N" environment, but it sure as hell won't be switching to G or B on you.
Those routers had issues with their early versions of firmware. They might have straightened it out by now. Upgrade it!

fosser2 said:
Have you upgraded to version 3.0.0.4.374.979?
http://dlcdnet.asus.com/pub/ASUS/wireless/RT-AC66U/FW_RT_AC66U_3004374979.zip
Click to expand...
Click to collapse
I will try this....
@makers_mark, there are still some g devices which need to connect

fosser2 said:
Have you upgraded to version 3.0.0.4.374.979?
http://dlcdnet.asus.com/pub/ASUS/wireless/RT-AC66U/FW_RT_AC66U_3004374979.zip
Click to expand...
Click to collapse
didn't work

No one has any ideas on where to look?

godutch said:
No one has any ideas on where to look?
Click to expand...
Click to collapse
Try changing the WIFI channel used in your router. My nexus 10 had issues on certain channels especially on 5GHZ.
You may also have a Wifi region setting somewhere on your nexus. I remember seeing it before but can't find it right now. The region basically locks your nexus to (possibly) the wrong channels. IE. Not all euro channels work with american wifi channels

bntran02 said:
Try changing the WIFI channel used in your router. My nexus 10 had issues on certain channels especially on 5GHZ.
You may also have a Wifi region setting somewhere on your nexus. I remember seeing it before but can't find it right now. The region basically locks your nexus to (possibly) the wrong channels. IE. Not all euro channels work with american wifi channels
Click to expand...
Click to collapse
I tried different channels and connecting to 2.4 GHz only.

Help!

HELP!!

Let's divide the problem into smaller pieces - is this an N7 LTE problem or ASUS router problem?
Get another router (I use the Asus RT-N66U) and test if it works with the N7 LTE. If it does, then it's your' router.
If it does NOT work wit hth eN7 LTE, then it's your N7 LTE probably have a bad chip.

I installed the kitkat factory images and the problem still persists :crying:

[Q] Suddenly can't see my 2.4GHz wifi.

Hey all
I have a T-800 with IronRom on it. Everything was working fine for almost 2 months now. Starting yesterday, my tab is unable to find my 2.4GHz WiFi, but is still able to find/connect to my 5GHz WiFi or other 2.4GHz networks (public hotspots).
Other devices see the 2.4GHz network fine, and can connect to it. I've just rebooter the router and payed closed attention to what happened. Once the router is online, i can briefly see the 2.4GHz network, i tried to connect to it and my tablet asks for the wpa2 key. When i entered it (it's pretty long) i clicked connect, but the network was already listed "out of reach" by then.
Some more info:
I have rebooted all related devices
Tablet CAN connect to 5GHz network
Tablet CAN'T connect to 2.4GHz network (out of reach)
Other devices (laptop, phones) CAN connect to the 2.4GHz network
Tablet CAN connect to other 2.4GHz network
I have tried a Wifi Analyzer app, that also can't see the 2.4GHz network.
What could cause this or how could i diagnose/fix this issue? Any help greatly appreciated!
Thanks a bunch in advance!

Perhaps some program you've installed recently has made changes to the system or settings that's prohibiting connection?
You seemed to have established there is nothing wrong with your network, and even the device can use both bands...
I would backup, reset the device and see if its still an issue.

Itchiee said:
Perhaps some program you've installed recently has made changes to the system or settings that's prohibiting connection?
You seemed to have established there is nothing wrong with your network, and even the device can use both bands...
I would backup, reset the device and see if its still an issue.
Click to expand...
Click to collapse
Thanks for your reply! I have performed a reset and the problem persists. I have contacted Samsung support and they say it's a hardware issue and i should send it in.
The repairs are outsourced to Dynafix (can't post URL because I'm a new user). Any idea on how they handle rooted tablets with a custom OS? Should i tell them upfront?

You should get it as far back to stock as you can... ie - odin a stock rom.
If its indeed a hardware issue then it shouldn't matter but don't give them that reason.

I managed to fix the problem with the suggestion of a friend. My 2.4GHz connection's channel setting on the router was set to automatic. I assigned it a fixed channel and it immediately popped back into my available networks. Weird problem, but I'm glad i didn't send it in for repairs because they would've charged me for it.

Had the same problem and it was rom related. I changed the rom and coud enable auto channel again in my router...
Sent from my SM-T700 using xda premium

problem with wifi

hello, something weird is happening with my nexus5.
what networks my various equipment can detect..
nexus 5x: my 5ghz, other's 2.4ghz
old devices: other's 2.4ghz, my 2.4ghz
lg g2: everything
so it is not any setting on my network (i am fiddling with it for over an hour now), any help what is happening?

Giorgos Chatziioannou said:
hello, something weird is happening with my nexus5.
what networks my various equipment can detect..
nexus 5x: my 5ghz, other's 2.4ghz
old devices: other's 2.4ghz, my 2.4ghz
lg g2: everything
so it is not any setting on my network (i am fiddling with it for over an hour now), any help what is happening?
Click to expand...
Click to collapse
Do your 5ghz and 2.4ghz have the same name?
Does it pick up your 2.4ghz when you set your phone 2.4ghz only mode.
What rom and update are you in?

1. No
2. No
3. Latest stock
... Nvm now that i used another house wifi and back again to my home it got fixed. I really dont understand what is going on

It maybe rom specific problem

Nexus 5X randomly lose connectivity

Hello there,
I am encountering a problem with my beloved N5X...
Since a few weeks it randomly loses connectivity (both cellular and Wi-Fi)
And after a few seconds (sometimes minutes) it catches the network back.
For example:
I wake up the phone for checking messages, and i see WhatsApp saying "searching for messages", no warning icons for network.
Then i try to load a Chrome page, it does not load..
After a few seconds all is getting back to normal and everything loads. (the web page, new messages notifications comes on, etc)
I tried so far:
- Reboot (after a reboot it works normally for a few hours, then problem begins again)
- Resetting network parameters (does nothing)
- Complete factory reset (had 2 weeks problem free then the problem begins again)
- Flashing custom ROM (from Google factory to last Lineage OS 15.1)
For informations:
- No VPN
- No gaming, the phone never heats up
- Good network coverage (both cellular and Wi-Fi)
- No network related apps
- The phone is 3 years old, never felt on the ground
Any ideas?
Thanks a lot for reply, and have a nice day!

I'm having a similar problem since Oreo update, but only on WiFi. On 4G network is working flawlessly but I think is due to carrier network settings on cellular towers.
Every search I made on the web to address the issue finished with a lot of posts read but no decent solution whatsoever, but the other day a reply on reddit made me think and I found a setting on my router WiFi AP section called "Unscheduled APSD (Automatic Power Save Delivery)" and since I disabled it my phone seems working better. I don't know if it's just random luck or it was really the cause of the issue but you can try.
Hope it helps.

.bucch said:
I'm having a similar problem since Oreo update, but only on WiFi. On 4G network is working flawlessly but I think is due to carrier network settings on cellular towers.
Every search I made on the web to address the issue finished with a lot of posts read but no decent solution whatsoever, but the other day a reply on reddit made me think and I found a setting on my router WiFi AP section called "Unscheduled APSD (Automatic Power Save Delivery)" and since I disabled it my phone seems working better. I don't know if it's just random luck or it was really the cause of the issue but you can try.
Hope it helps.
Click to expand...
Click to collapse
Hello,
Thanks for your reply.
I searched everything on the phone that could be wrong and i also ended up that router might be the cause.
I did not found the setting you mention (i'm on Synology router) but i tried to disable the 5 GHz frequency band and use only the 2.4 GHz one.
Since then the phone works perfectly! Although the Wi-Fi speed is a bit slower..
I hope this can help you too!

breacH86 said:
Hello,
Thanks for your reply.
I searched everything on the phone that could be wrong and i also ended up that router might be the cause.
I did not found the setting you mention (i'm on Synology router) but i tried to disable the 5 GHz frequency band and use only the 2.4 GHz one.
Since then the phone works perfectly! Although the Wi-Fi speed is a bit slower..
I hope this can help you too!
Click to expand...
Click to collapse
I was on 2.4Ghz only since a few months but had the issue anyway before disabling uAPSD.
If your bandwidth is reduced is probably because your network is on a "busy" channel, try scanning all the wireless networks around your home (i use wifi analyzer on my phone) and see which are the "busy" channels and set yours on a free one. Bandwidth on 2.4 and 5 ghz should be the same, the pro of the first is a better (wider) coverage of the signal, mostly through walls and the pro of the second is less interference with other wireless technologies and environment at expenses of the coverage.

.bucch said:
I was on 2.4Ghz only since a few months but had the issue anyway before disabling uAPSD.
If your bandwidth is reduced is probably because your network is on a "busy" channel, try scanning all the wireless networks around your home (i use wifi analyzer on my phone) and see which are the "busy" channels and set yours on a free one. Bandwidth on 2.4 and 5 ghz should be the same, the pro of the first is a better (wider) coverage of the signal, mostly through walls and the pro of the second is less interference with other wireless technologies and environment at expenses of the coverage.
Click to expand...
Click to collapse
Well, after a few days i noticed the problem still persist even on 2.4GHz, but less than before..
Unfortunately Synology router does not have APSD option in the Wi-Fi settings.
I tried to put Protected Management Frames (PMF) on "enable - optional", that setting was disabled before.
Wait and see.
Thanks again!