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wifi sleep policy not work correctly?

My wifi seems to disconnect from my wifi when the screen turns off, despite me having changed my settings to never sleep. When I look at the wifi settings it says "Unsuccessful Connection". I didn't have this problem with my MT3G.
Anyone having similiar issues or a fix?

wifi Reconnection issues
I'm having the same problems with mine.
It initially connects to wifi fine but when the screen goes off it sometimes drops the connection and will not reconnect without a reboot.
I have tried setting it to keep the wifi when sleeping but it makes no difference.
I found a few similar reports elsewhere and followed most of the suggestions, like changing routers, changing wifi channels, setting an IP address instead of DHCP etc. Nothing seems to make any difference so far.

Mine never seems to reconnect after waking up, but I just go into the Wireless settings/Wifi settings window (where it lists all the Wifi networks in the area) and press on the network name and it brings up a dialog allowing me to connect again. I press the Connect button and it instantly reconnects. No reboot required...

Try increase your router's "Group Key Update Interval". I had the same problem with my D-Link DIR-655. I changed mine to 10 hours and it's working fine for me now.

i have the issus that my wifi is "connected" i mean i see the logo at the top bar but after a few minutes i don't get any update from the internet like gmail oder twitter when is wake up the device from sleep i get them back again
maybe it something with the Group Key Intervall but i can't switch it on my speedport w700v router

I just tried switching mine, highest it can go is 7200 seconds, so I bumped it to two hours instead of one. linksys
my wifi reconnects when I wake the screen almost 100% but it's not reliable.
I have to go to wifi list and reconnect. Sometimes I disable wifi and then re enable, conects no problem. Irritating

i heared that switching the encryption from wpa/wpa2 to only wpa2 will solve this issues, will try it when i am at home

...seems like almost everybody got this problem.

for example with my Hero i don't had this problems so it's something with the W-Lan card of the Nexus

Got this problem too but will try the suggested work arounds when I get home tonight

found out that my encryption is wpa2 not wpa/wpa2 ... damn so thats not the reason
and my router cant configure the group key intervall

I don't have this issue, running CM5.0.3.1, mine is set to Never Sleep and it does not. My connection does not time out either. I connect to two Trendnet TEW-637AP's at home, in mixed b/g/n mode with WPA2-PSK mode security.

Could it be, that this prob exists just for nonrooted phones?!

i've got mcr 1.6 which is rooted and don't work
i think it's a problem with the wifi card and the wifi router
rooting just means that you get read/write access to all folders
doesn't change anything on your wifi connection

qvert said:
i've got mcr 1.6 which is rooted and don't work
i think it's a problem with the wifi card and the wifi router
rooting just means that you get read/write access to all folders
doesn't change anything on your wifi connection
Click to expand...
Click to collapse
Not exactly, it means also modified system files, which could include those that interface with the wifi chip and those that control the sleep state of the device.
Also, Cyanogen (and most other custom roms now) are running on a different (newer) kernel.

yes i know
but mcr is although running on different kernel and it's not working there
i don't think its an issue bei the stock rom and mcr
maybe here is someone with CM where the wifi drops?
edit:
okay i tried it with the desire rom version from modaco, the same failures, maybe i try a CM built now, and see if it changes
Code:
[B]Rom [/B] [B]Router / Access Point[/B]
MCR 1.6 | Speedport w700v | not working
Desire MCR | Speedport w700v | not working
CM 5.0.3.1 | Speedport w700v | not working
i think this means it's not a rom issue, its something with the routers and access points in combination of the wifi card from the nexus

That´s strange..perhaps just accidentally, but: yesterday I installed "Task Manager" , which has an auto-kill function.....since then my Wifi reconnects perfectly

maybe because it automatically does anything inside of the 10 minutes which keeps the wifi active?
which one did you install?
there are a lot of them on the market
which developer?
edit:
ah i found a strange issue, today i was at the wifi of my girlfriend, she has the same router BUT i don't have the wifi problems there, with the same model of router thats very strange

i found another work around, i set my twitter client to 5 minutes update intervall, this means every 5 minutes is network traffic and the connection won't drop after my 10 minutes public key intervall change
don't know how much battery is used while setting from 10 to 5 minutes but i think it should be okay

Try a different WiFi channel
I've seen reports of WiFi connection problems being solved by changing channels on the AP. Channel 10 seems to be a consistently reliable choice.

[Q] Wifi stockrom ICS

Since a few days I'm running the ICS stockrom on an unrooted Note. Before on the GB I was have not the best reception with Wifi, but it was working. Now, with ICS, my Wifi is connecting/disconnecting/connecting/and so on within a matter of seconds. I'm experiencing this on multiple Wifi networks. Therefore I would say it does not concern the settings of my Wifi network, also I'm practically sitting on the router (channel, reception can't be issue).
I've installed ICS via Kies and have done an additional factory reset today.
Does anybody know what could be the cause of this? And, more important, how to solve it?

1979Sentinel said:
Since a few days I'm running the ICS stockrom on an unrooted Note. Before on the GB I was have not the best reception with Wifi, but it was working. Now, with ICS, my Wifi is connecting/disconnecting/connecting/and so on within a matter of seconds. I'm experiencing this on multiple Wifi networks. Therefore I would say it does not concern the settings of my Wifi network, also I'm practically sitting on the router (channel, reception can't be issue).
I've installed ICS via Kies and have done an additional factory reset today.
Does anybody know what could be the cause of this? And, more important, how to solve it?
Click to expand...
Click to collapse
Others have had similar issues - try reflashing the same modem from here:
http://forum.xda-developers.com/showthread.php?t=1645202
I found that wi-fi and data both worked better after flashing the modem a second time.

Thank you very much it seems to be working!!
I had to look to find out how to get the phone in download mode, but got it.
Sad to say I did an unneeded factory reset this morning, but yeah it is working now!

I've been also noticing momentary WiFi disconnections ever since I upgraded to ICS.
I'm using MyPhoneExplorer to transfer files wirelessly to the device (not via USB), and ever since ICS it has became an unreliable way to transfer files. If I transfer a big file most chances are that the WiFi connection will drop during the transfer, causing it to fail.
The connection is restored immediately but then I have to restart the transfer process as it halts when the connection fails.
I have excellent signal level (physically located close to the Access Point), I tried flashing the latest modem firmware (XXLR1) - twice, I've set "2.4GHz only" in the WiFi advanced settings, all to no avail: I still get these connection drops.
The same setup (phone, access point, etc) has all been working well in the past with GB. Now with stock ICS it performs poorly.
Has anybody got any information about this problem? Been experiencing similar problems?
Thanks!

I've been getting this issue too but it seems to only be with our virgin router, all other devices connected to it are fine although the signal is a bit crap on them to its at least stable
I tried the modem flash etc but no improvement, I'm pretty sure its the ****e virgin router
Sent from my GT-N7000 using xda premium

sagie said:
I've been also noticing momentary WiFi disconnections ever since I upgraded to ICS.
I'm using MyPhoneExplorer to transfer files wirelessly to the device (not via USB), and ever since ICS it has became an unreliable way to transfer files. If I transfer a big file most chances are that the WiFi connection will drop during the transfer, causing it to fail.
The connection is restored immediately but then I have to restart the transfer process as it halts when the connection fails.
I have excellent signal level (physically located close to the Access Point), I tried flashing the latest modem firmware (XXLR1) - twice, I've set "2.4GHz only" in the WiFi advanced settings, all to no avail: I still get these connection drops.
The same setup (phone, access point, etc) has all been working well in the past with GB. Now with stock ICS it performs poorly.
Has anybody got any information about this problem? Been experiencing similar problems?
Thanks!
Click to expand...
Click to collapse
At my side it seems to be working better now, steps I've taken (in this order):
1. Flashing new modem
2. Enter fixed IP address for my home Wifi
3. At Settings->Wifi->Advanced->Leave Wifi on when enabled
Especially the last seems to have done me good. I have it working in combination with BatteryFu so it does not consume my complete battery.

Androboyben said:
I've been getting this issue too but it seems to only be with our virgin router, all other devices connected to it are fine although the signal is a bit crap on them to its at least stable
I tried the modem flash etc but no improvement, I'm pretty sure its the ****e virgin router
Sent from my GT-N7000 using xda premium
Click to expand...
Click to collapse
Well, the AP that I had problems with is a relatively recent D-Link 802.11n router. Nevertheless, I tried connecting with an old Cisco 802.11g router, and lo and behold - connection is now stable.
So, looks like there is indeed some interoperability problems but I won't dismiss this as a "****e <X-company> router" - as the same router is working well with other clients, and moreover, was working well with this phone when it was running an older GB firmware.
My conclusion is that apparently somebody at Samsung / Google has broken the Wi-Fi drivers, interoperability-wise.
1979Sentinel said:
At my side it seems to be working better now, steps I've taken (in this order):
1. Flashing new modem
2. Enter fixed IP address for my home Wifi
3. At Settings->Wifi->Advanced->Leave Wifi on when enabled
Especially the last seems to have done me good. I have it working in combination with BatteryFu so it does not consume my complete battery.
Click to expand...
Click to collapse
You probably mean leav wifi on when screen is off? My phone is already set this way... Anyhow, thanks, but it looks like this is a problem with a specific router as I wrote in the first part of this message.

[Q] XT1058 Can't connect to WiFi

Hello Everyone,
This is my first post here so I will try to be clear and short.
I'm using a Moto X XT1058, first, Stock Br Android 5.1 Firmware, unlocked bootloader I had a long time since I upgraded from 4.4.4, until yesterday everything went normal, when I arrived home from work I noticed my phone didn't connect automatically to my house lan, so I tried to manually select the SSID on the WiFi menu and I clicked connect, then, instead of the "connecting" > "Assigning IP Address" > "connected" steps, it changed to saved and no connection was made, and every time I try it does the same. I tried almost everything I could to fix this and the result is the same (images attached):
- Clicked on forgot, and tried again with the correct password.
- Reset my router to factory and upgraded firmware.
- Switched over different wireless authentication methods, even open.
- No firewall or MAC filtering is activated on my router.
- Wireless settings are the default, I can connect with any other device except my phone works( Notebook, Desktop with Wireless adapter, my dad's phone Moto G).
- I made a factory reset on my MotoX, switched over 5.1, I made a downgrade to 4.4.4, full wipe, loaded a past backup with twrp, flashed via mfastboot manually, switched again to a fresh install of 5.1, still can't connect.
- I read something about cleaning wifi cache and accessing wlan test and test wifi drivers using dialer code *#*#526#*#* but it didn't work on mine, also read something about checking wireless interface using a root terminal, but honestly I'm starting to lose faith on this...
I like this phone so much and I don't wanna expend on another unless this really doesn't have any fix.

When going to the WiFi Options (three dots bottom right on the WiFi screen) make sure "Avoid poor connections" isn't checked, also try selecting the right band (2,4 or 5GHz) manually. Also turn of "WiFi Optimization", unlikely that this causes your problems but overall this setting will bring you into trouble before it saves a noteable amount of battery. Do you see a MAC Address on the bottom there? On your router manually set a channel (on 2,4 GHz try 7, should be pretty empty there). Try enabling WiFi on your phone while your routers WiFi is off, then turn on the router. Maybe you can solve this by manually restarting the service on the phone through terminal or adb if you have root, that works for me although I had a little different problem:
su
svc wifi disable
svc wifi enable
disable first even if you disabled through the menubutton.

I tried
Hardmood said:
When going to the WiFi Options (three dots bottom right on the WiFi screen) make sure "Avoid poor connections" isn't checked, also try selecting the right band (2,4 or 5GHz) manually. Also turn of "WiFi Optimization", unlikely that this causes your problems but overall this setting will bring you into trouble before it saves a noteable amount of battery. Do you see a MAC Address on the bottom there? On your router manually set a channel (on 2,4 GHz try 7, should be pretty empty there). Try enabling WiFi on your phone while your routers WiFi is off, then turn on the router. Maybe you can solve this by manually restarting the service on the phone through terminal or adb if you have root, that works for me although I had a little different problem:
su
svc wifi disable
svc wifi enable
disable first even if you disabled through the menubutton.
Click to expand...
Click to collapse
Hello and thanks for replying! I tried what you suggested with no luck, today I noticed the problem got worse... not my phone doesn't detects any wifi signal...
I think this is a hardware failure problem and I have yo buy another phone
Any other ideas?

Sad to hear that, one last thing you could try is removing the battery. Since this isn't possible without disassembly there's a trick I got from the Motorola Service, they call it Hung State Recovery:
This works as if the battery was removed from the device. Since it is built-in it is impossible
to remove the battery for it would void the warranty.
This process terminates all running commands from the processor allowing it to start anew.
No Data will be lost in the process.
With the device switched OFF (even if the device is not turning ON at all) follow the steps
bellow.
1. Please press and hold the VOL DOWN key
2. While still holding the VOL DOWN key, press and hold the POWER key
3. Hold both keys down for over 120 seconds.It must be more than 2 minutes!
4. After holding the keys down for more than two minutes, release them.
5. The Flash Boot screen will display, and the Normal Reboot option will be highlighted
6. Press the VOL UP key and the device will start a normal reboot.
Click to expand...
Click to collapse
Unlikkely that this will help but it's just 2 minutes and at least a chance.

It's alive again
Hardmood said:
Sad to hear that, one last thing you could try is removing the battery. Since this isn't possible without disassembly there's a trick I got from the Motorola Service, they call it Hung State Recovery:
Unlikkely that this will help but it's just 2 minutes and at least a chance.
Click to expand...
Click to collapse
Hello again... I almost gived up since yesterday but I don't know why, I wanted to try again... I even ordered a new phone from an online shop... but I just tried to connect to my wifi, and the reason why it wasn't detecting any APs was because I left the 5.0 Ghz band activated on one of my failed attempts to get Wifi working. Just switched again to automatic, clicked on my home AP and authenticated with my password and Bingo! It worked...
Not sure why but it got fixed somehow
Thanks for helping me out, I would try to sell it since I got a new one.

Good to hear that, that's a pretty common issue as it seems why I already suggested forcing the phone to use the right band. Don't set to automatic if you don't need both frequencies. Instead of selling the Moto X why don't you ship the new one back? If still sealed you shouldn't have problems getting a refund and in terms of one hand useable screen size, memory and cpu power you shouldn't need more until it comes to games or some strange kinds of usage where everybody clear in mind would choose a laptop.

No 5GHz wifi networks detected nor able to transmit 5GHz hotspot

First off the oligitory i have this phone, P20 pro currently rooted running EMUI 8, stock rom, stock kernel, magisk
Such a weird problem as the title says I can't detect or connect to any 5GHz wifi. I have tried to force connect via "Add Network" function. I have reviewed some files inside /etc that were suggested in a P20 lite thread, can't remember where they were/name, but the "enable 5GHz = 1". Something that is tied to it also, is that I can no longer transmit the hotspot on the 5GHz band, inside the hotspot advanced settings tab.
Now for the things that changed before i noticed no 5GHz networks.
-Changed the 5GHz hotspot to 2.4GHz to penetrate a wall better.
-Traveled to Honduras, switched networks to claro while in Honduras.
I am thinking it might be a geolocation type restriction as ihave never had this happen anywhere else before. It will also be about a week or so till I get back state side to hook the phone back to T-Mobile to see if that changes things. Might be tied the the GPS somehow, might be a stretch but i don't know.

1slotrk said:
First off the oligitory i have this phone, P20 pro currently rooted running EMUI 8, stock rom, stock kernel, magisk
Such a weird problem as the title says I can't detect or connect to any 5GHz wifi. I have tried to force connect via "Add Network" function. I have reviewed some files inside /etc that were suggested in a P20 lite thread, can't remember where they were/name, but the "enable 5GHz = 1". Something that is tied to it also, is that I can no longer transmit the hotspot on the 5GHz band, inside the hotspot advanced settings tab.
Now for the things that changed before i noticed no 5GHz networks.
-Changed the 5GHz hotspot to 2.4GHz to penetrate a wall better.
-Traveled to Honduras, switched networks to claro while in Honduras.
I am thinking it might be a geolocation type restriction as ihave never had this happen anywhere else before. It will also be about a week or so till I get back state side to hook the phone back to T-Mobile to see if that changes things. Might be tied the the GPS somehow, might be a stretch but i don't know.
Click to expand...
Click to collapse
Can other mobile phones find 5Gwifi?

Yes they can. MANY other devices can find and connect to the WIFI. I have got an update after taking the phone out of airplane mode i was able to switch the hotspot back over to the 5GHz. Still cannot connect or find the 5GHz network

1slotrk said:
Yes they can. MANY other devices can find and connect to the WIFI. I have got an update after taking the phone out of airplane mode i was able to switch the hotspot back over to the 5GHz. Still cannot connect or find the 5GHz network
Click to expand...
Click to collapse
Happen to me few days ago after Pie update. It can't find my hotspot created from my Redmi Note 5 Ai over 5Ghz. But it still can find my office 5Ghz network.
Fixed after rebooting the phone. Now it can see both network

So I want to close this thread out. As soon as I connected back to a stateside 4g carrier, the phone decided to re-enable the 5ghz side of the wifi. All of this happened all on its own. I made sure to check it within a short time off reconnecting stateside. Crazy stuff.

Redmi 9C connected to wifi but no Internet

I just bought this phone and I'm trying to use it in my network. I use Ubiquiti products (16-port switches and a bunch of AP access points). I connected the phone via wifi to my network and it has no problem for a while until it just doesn't have Internet connection. It stays connected with its IP address intact but for some reason it cannot seem to reach the Internet. The workaround is to simply turn off the wifi module and turn it back on. It's randomly happening and the workaround is very annoying.
I have a couple of other mobile devices (iPads, iPhones, Android phones, Windows laptops, etc.) and I never experienced the issue with these. I tried connecting the Redmi 9C to all my wifi networks:
Guest wifi with captive portal
Main wifi with RADIUS authentication
IoT wifi with regular WPA2 personal authentication
I tried resetting the wifi settings of the phone. I tried reinstalling the latest MIUI fw/sw.
and the result is the same, every time. At this point, I can safely consider that there has to be something wrong with the phone. I'm not sure if it's because of the MIUI 12 update because I updated the phone to the latest firmware as soon as I got it out of the box. Is this a known issue with this phone? I have another Xiaomi phone (Mi Mix 3) on the same network without any issues.
Any ideas?

Same thing is happening with my Redmi 9c
I am encountering the same problem with my device.
I have my region in Bangladesh (the country I live in) ,tried changing it a few times. Also upgraded my MI UI version but nothing changed.

Ariq55 said:
I am encountering the same problem with my device.
I have my region in Bangladesh (the country I live in) ,tried changing it a few times. Also upgraded my MI UI version but nothing changed.
Click to expand...
Click to collapse
I don't face this problem in my device which framware you using
Try to update in leatest framware

I always use the updated firrmware but it's too late, I returned and asked for a refund for this phone and replaced it with a Huawei Y6P.

I'm having a similar issue with my redmi 9, wifi works fine but all of a sudden it stops working even though it's connected. Apps dont load, messages dont go through and i have to toggle the off and on wifi. I'm on miui 11, there are no updates available when i try to update but i'm about to ask for a refund. This issue is very annoying