Hi Guys,
I am facing a problem with the WiFi staying on on my brand new xz1.
In the Wifi preferences, under Advanced preferences, if i select "Never" for the option "Keep WiFi on during sleep", i have noticed that the Wifi turns off when the phone goes in sleep mode.
But the problem is that it does not turn back on. It stays off until i turn it back on.
Does anyone else also experience this or is my understanding off somewhere?
Thanks,
Prasad
No one else is experiencing this?
What could I be doing wrong or maybe i have set this wrong?
Any help guys?
Nope. I even noticed that since the latest update for my Z5 that wifi kinda doesn't work even tho it shows as connected after the phone has entered sleep. My XZ1 does the same. I'm assuming it's some new android power saving? My As soon as I unlock everything works fine again but if I'm downloading torrents or streaming movies to my tv i need to keep the phone plugged in so it doesn't sleep
pdash79 said:
Hi Guys,
I am facing a problem with the WiFi staying on on my brand new xz1.
In the Wifi preferences, under Advanced preferences, if i select "Never" for the option "Keep WiFi on during sleep", i have noticed that the Wifi turns off when the phone goes in sleep mode.
But the problem is that it does not turn back on. It stays off until i turn it back on.
Does anyone else also experience this or is my understanding off somewhere?
Thanks,
Prasad
Click to expand...
Click to collapse
If you select never it means: never keep wifi on during sleep = turn wifi off during sleep.
Select "always" if you want to have wifi always on.
pdash79 said:
Hi Guys,
I am facing a problem with the WiFi staying on on my brand new xz1.
In the Wifi preferences, under Advanced preferences, if i select "Never" for the option "Keep WiFi on during sleep", i have noticed that the Wifi turns off when the phone goes in sleep mode.
But the problem is that it does not turn back on. It stays off until i turn it back on.
Does anyone else also experience this or is my understanding off somewhere?
Thanks,
Prasad
Click to expand...
Click to collapse
The problem is your comprehension on the setting. Understand the setting and the options it is very clear once you understand the meaning of the setting.
You have set the phone to deny WiFi when screen off. Full stop
I experienced an issue on the first day where it would connect and then quickly disconnect while connecting to a public network. Haven't faced the issue since then again under the same circumstances.
dillalade said:
The problem is your comprehension on the setting. Understand the setting and the options it is very clear once you understand the meaning of the setting.
You have set the phone to deny WiFi when screen off. Full stop
Click to expand...
Click to collapse
Yes quite right.
I have set the phone tondeny wifi onky when the phone sleeps.
Does it bot mean then that when thw phone wakes up from sleep, the wifi should also turn back on?
That is how it works on other android devices.
But with xz1 once the device goes to sleep, wifi shuts down which is good.
But when i wake the device, wifi stays off. It does not turn back on.
Thanks for reading.
pdash79 said:
Yes quite right.
I have set the phone tondeny wifi onky when the phone sleeps.
Does it bot mean then that when thw phone wakes up from sleep, the wifi should also turn back on?
That is how it works on other android devices.
But with xz1 once the device goes to sleep, wifi shuts down which is good.
But when i wake the device, wifi stays off. It does not turn back on.
Thanks for reading.
Click to expand...
Click to collapse
I see.
Not noticed anything like this.
However I have the same setting applied (WiFi off during sleep.)
So I'll test this later and report back.
dillalade said:
I see.
Not noticed anything like this.
However I have the same setting applied (WiFi off during sleep.)
So I'll test this later and report back.
Click to expand...
Click to collapse
Thanks buddy
pdash79 said:
Thanks buddy
Click to expand...
Click to collapse
It works for me dude. WiFi signal reconnects as expected when screen is turned back on after a sleep.
All I can say is Sony's OTA updates since even my z3 have always caused issues. Try a factory reset.
Thanks for testing it out and glad to know there is no issue.
Will do a reset soon enough and report back though it might take a while as i am travelling.
dillalade said:
It works for me dude. WiFi signal reconnects as expected when screen is turned back on after a sleep.
All I can say is Sony's OTA updates since even my z3 have always caused issues. Try a factory reset.
Click to expand...
Click to collapse
Cool bro.
The reset fixed it.
Now it works.
Thanks for your suggestion.
Sweet!
Possible solution
pdash79 said:
Hi Guys,
I am facing a problem with the WiFi staying on on my brand new xz1.
In the Wifi preferences, under Advanced preferences, if i select "Never" for the option "Keep WiFi on during sleep", i have noticed that the Wifi turns off when the phone goes in sleep mode.
But the problem is that it does not turn back on. It stays off until i turn it back on.
Does anyone else also experience this or is my understanding off somewhere?
Thanks,
Prasad
Click to expand...
Click to collapse
Try turning off data. There is a setting that keeps the lte active for faster network switches. I have same issue. Don't notice it when data is off.
I am suffering the same Wi-Fi issue. It is only since the recent update this has occurred. I've contacted Sony to no avail. It's driving me mad.
Same here (FW:47.1.A.12.145) WIFI router is with atheros chipset.
When phone is going to "sleep" wifi is switching off (even if it is set to not do so).
It seems that flushing cache partition is fixing it for some time.
Related
Got the galaxy s2 running XWKE7
Under wifi settings>advanced>Wifi sleep policy. selecting turn off wifi when screen is off setting does not seem to take effect.
Tested by pinging it and continues to ping even 5-10 mins after screen is turned off.
anybody else having the same issue ?
Have the same issue, want my wifi to turn off when the screen turns off but wifi stays connected.
Only thing I can think of is that i restored my access point with titanium.
Can this cause any problem and if it can, can I delete the restored settings?
My sleep policy works fine when turning screen off. When i turn on the screen, the wi-fi icon appears after a few seconds. Also the battery usage shows that wi-fi is off when screen is off and phone inactive. Might be related to one of your apps that conflicts with the wi-fi policy. Happened to me when using an app that had options to turn on/off wi-fi scanning.
Sp1tfire said:
My sleep policy works fine when turning screen off. When i turn on the screen, the wi-fi icon appears after a few seconds. Also the battery usage shows that wi-fi is off when screen is off and phone inactive. Might be related to one of your apps that conflicts with the wi-fi policy. Happened to me when using an app that had options to turn on/off wi-fi scanning.
Click to expand...
Click to collapse
Weird, will have to check this up.
But as far as I know I don't have any other app that manages wifi.
As you can see in my screenshot, wifi is on at all time even when sleep policy is set to sleep when screen off.
Currently I'm not connected to any wifi since I don´t have any in range at work but it looks exactly the same when I´m connected to my home network.
Sp1tfire said:
My sleep policy works fine when turning screen off. When i turn on the screen, the wi-fi icon appears after a few seconds. Also the battery usage shows that wi-fi is off when screen is off and phone inactive. Might be related to one of your apps that conflicts with the wi-fi policy. Happened to me when using an app that had options to turn on/off wi-fi scanning.
Click to expand...
Click to collapse
Hi, I have the opposite problem, I don't want my WF turns off when is sleeping. I remember that a program ask me to turn WiFi in energy save mode but I cannot remember which app and I have no clue how to go back...
Any help?
Tks a lot!
Max
maxgajo said:
Hi, I have the opposite problem, I don't want my WF turns off when is sleeping. I remember that a program ask me to turn WiFi in energy save mode but I cannot remember which app and I have no clue how to go back...
Any help?
Tks a lot!
Max
Click to expand...
Click to collapse
Have you tried setting the sleep policy to 'never'?
Has anyone found a solution to this problem? I did a factory reset (XXKI4) and it was still the same. Screen off, policy set to turn off when screen is off but I can still ping the phone after a few minutes.....?!?
EDIT: I remembered ;-) Had the same thing on my original Galaxy over a year ago.
Needed to edit a database:
http://forum.xda-developers.com/showpost.php?p=7998204&postcount=459
Cant save sleep settings.....
I have a slightly stranger problem that's just started. I'm aware of the situation where wifi takes 15 mins to turn off after screen turns off was never bothered with that aspect.
However, since today I found wifi was staying on continuously - checked in settings & wifi sleep policy had reverted to 'never' - I always had it set to 'sleep when screen turns off'.
The problem now is that I change it to sleep when screen turns off' and 'save' this setting but it's not saving - when wifi goes off & then back on again or if I reboot phone, it reverts to 'never'.
Any ideas folks?
Back-up data and factory reset .
jje
Would like to know this too.
Wouldn't like to back up and reset everytime this happens.
Also couldn't find the files in /dbdata folder as indicated by the Galaxy S thread pointed to.
Is there any other solution?
someone says using static IP will solved this issue but It didn't...
Any news on that?
Sp1tfire said:
My sleep policy works fine when turning screen off. When i turn on the screen, the wi-fi icon appears after a few seconds. Also the battery usage shows that wi-fi is off when screen is off and phone inactive. Might be related to one of your apps that conflicts with the wi-fi policy. Happened to me when using an app that had options to turn on/off wi-fi scanning.
Click to expand...
Click to collapse
Thanks a lot !!! solved
ipkalgrp said:
Thanks a lot !!! solved
Click to expand...
Click to collapse
how did you solved this ?
I have the same problem....
PsyOr said:
how did you solved this ?
I have the same problem....
Click to expand...
Click to collapse
Me too! Any word on that?
Had the same problem, where the battery no longer lasted the whole day.
When I checked under "Settings/ Battery" and clicked on the graph I could see that whilst the phone was sleeping, WiFi was not.
I have done a few "factory resets." All seemed okay to start off with and then after a while I would notice the same problem.
This last time I found that "Google Now" is the culprit.
Just click on the blue Google Icon, under Applications, then bring up the menu, click on "Privacy and Accounts" then "Google Location Settings", then "Location Access" and make sure "Use wireless networks" is not checked. (also available from "Settings/ Location services")
That fixed it for me!!
David.T said:
Had the same problem, where the battery no longer lasted the whole day.
When I checked under "Settings/ Battery" and clicked on the graph I could see that whilst the phone was sleeping, WiFi was not.
I have done a few "factory resets." All seemed okay to start off with and then after a while I would notice the same problem.
This last time I found that "Google Now" is the culprit.
Just click on the blue Google Icon, under Applications, then bring up the menu, click on "Privacy and Accounts" then "Google Location Settings", then "Location Access" and make sure "Use wireless networks" is not checked. (also available from "Settings/ Location services")
That fixed it for me!!
Click to expand...
Click to collapse
Mine is not checked and its still keep 'on' for almost hour...
as far as I know its better to be on wifi instead of data, eat less battery... but anyway I guess its have its own wakelocks...
Hey everyone, I seem to be having issues when using wifi. When home I try to use wifi and it connects and seems to be working fine. After a while when sitting idle everything will just stops working. The phone itself seems fine, but i'll stop getting email and anything that uses internet stops working as well. To get things to start working I have to either toggle wifi or just turn wifi off.
Any ideas?
Check your battery/sync settings. If you changed to normal sync/wifi/etc will turn off after 15 minutes unless you manually change it.
Even at Performance power setting, I found my Wi-Fi would still go to "sleep" after sitting for a while. The culprit I think is the "Sleep Mode", which is enabled by default. Changing that to manual or even off should solve the problem.
fr4c said:
Even at Performance power setting, I found my Wi-Fi would still go to "sleep" after sitting for a while. The culprit I think is the "Sleep Mode", which is enabled by default. Changing that to manual or even off should solve the problem.
Click to expand...
Click to collapse
You have to go to Advanced under WiFi Settings (Hit menu button) and turn always on.
Mine has the same "problem." I'm ok with WiFi turning off to save battery. I haven't been able to reliably get it to wake up.
AtLemacks said:
You have to go to Advanced under WiFi Settings (Hit menu button) and turn always on.
Click to expand...
Click to collapse
Didn't know that, thanks!
Good call, man. I think that's why mine randomly shuts off too! Im gonna start setting sleep mode for when I sleep every night.... It says it shuts off networks when screen is off but when I turn it on, WiFi is on right away...when you turn WiFi off it takes much longer than that to power up so I don't know what networks its shutting down lol
fr4c said:
Even at Performance power setting, I found my Wi-Fi would still go to "sleep" after sitting for a while. The culprit I think is the "Sleep Mode", which is enabled by default. Changing that to manual or even off should solve the problem.
Click to expand...
Click to collapse
Sent from my ADR6425LVW using XDA App
No problemo!
Does anyone else have an issue with the WiFi sleep policy? My WiFi never turns off when my tablet is in sleep mode. I set it to 'never', turn off the screen and no matter how long I wait, it is still connected to WiFi while the screen is off (which destroys the battery now). I have been turning it off manually and putting it into low performance mode every time I turn off the screen, but would like this to be automatic. Any suggestions?
Wont turn off for me also... its killing my battery. I hope a fix is coming soon. .13 has made my perfect tablet a POS.
Wifi is on all the time with nothing turned off and I lost 13% battery over 7 hours. But Im still on .11. I have 5 emails, facebook and weather on push/update amongs other things. Iwould check if something is constantly running in the background and keeping wifi on.
Use Auto Airplane Mode (free on the market). Will disable wifi when asleep. Works well.
Mine never turns off either, I use Juice Defender.
d1ez3 said:
Does anyone else have an issue with the WiFi sleep policy? My WiFi never turns off when my tablet is in sleep mode. I set it to 'never', turn off the screen and no matter how long I wait, it is still connected to WiFi while the screen is off (which destroys the battery now). I have been turning it off manually and putting it into low performance mode every time I turn off the screen, but would like this to be automatic. Any suggestions?
Click to expand...
Click to collapse
eeehmmmm..... when you set it to 'never', it will NEVER turn off wifi. so what you are describing is supposed to happen!
or did i understand you wrong?
Blackwidowman said:
But Im still on .11.
Click to expand...
Click to collapse
And there's why lol
Just putting it out there, but my WiFi state while asleep doesn't seem to do anything one way or another. My battery drains the same amount if I don't actually disable WiFi, and connectivity is never there on wake (even if set to be).
js931 said:
eeehmmmm..... when you set it to 'never', it will NEVER turn off wifi. so what you are describing is supposed to happen!
or did i understand you wrong?
Click to expand...
Click to collapse
Actually its set to "keep wifi awake on sleep" never
The OP did not specify what FW he was on hence I mentioned mine. In your case assuming youre on .13 and got the bug, I think Gary mentioned they had pin-pointed the problem and coming out with a fix by early next week.
Blackwidowman said:
The OP did not specify what FW he was on hence I mentioned mine. In your case assuming youre on .13 and got the bug, I think Gary mentioned they had pin-pointed the problem and coming out with a fix by early next week.
Click to expand...
Click to collapse
Sorry its on .13
Sorry to revive an old thread but has this issue ever been solved? No matter how many times I set "Keep Wi-Fi on during sleep" to "Never", the moment I change wifi access points or turn off then turn on wifi, it reverts back to "Always".
I am running the latest update .21.
Furthermore under "ASUS Customized Settings", "Disconnect network during sleep" has been giving me similar issues as well.
Any input would be greatly appreciated, thank you!
Mine battery widget says that wi-fi is ON all the time when sleeping no matter what is ticked in option. So i turn off wi-fi manually to save battery.
Sent from my Transformer Prime TF201 using XDA Premium HD app
I use Tasker...
Screen on, wifi on.
Screen off, wifi off.
It's automatic, and works great.
I don't mind my wifi being on, with all the apps that run in the background they always on, notifying me of new emails and app updates.
I found out just recently that my tablet was still connected to Wifi, even though the last usage of my tablet was about a day before. I have the disconnect network during sleep enabled and keep Wi-fi on during sleep set to never and I still experience 96% battery usage according to battery widget. Idle is at 4% usage. So I went through the settings, unchecked/unselected, then rechecked/reselected the choices to make sure they're actually selected. BTW, I'm on the latest firmware - 9.2.1.24. I can say it hasn't rebooted for over 265 hours.
hoang51 said:
I found out just recently that my tablet was still connected to Wifi, even though the last usage of my tablet was about a day before. I have the disconnect network during sleep enabled and keep Wi-fi on during sleep set to never and I still experience 96% battery usage according to battery widget. Idle is at 4% usage. So I went through the settings, unchecked/unselected, then rechecked/reselected the choices to make sure they're actually selected. BTW, I'm on the latest firmware - 9.2.1.24. I can say it hasn't rebooted for over 265 hours.
Click to expand...
Click to collapse
9.2.1.24 ??
kevinm2k said:
9.2.1.24 ??
Click to expand...
Click to collapse
TF101, sounds like.
Peter Galbavy said:
TF101, sounds like.
Click to expand...
Click to collapse
in prime forum.. nice! nothing like confusion!
originalnabisco said:
Sorry to revive an old thread but has this issue ever been solved? No matter how many times I set "Keep Wi-Fi on during sleep" to "Never", the moment I change wifi access points or turn off then turn on wifi, it reverts back to "Always".
I am running the latest update .21.
Furthermore under "ASUS Customized Settings", "Disconnect network during sleep" has been giving me similar issues as well.
Any input would be greatly appreciated, thank you!
Click to expand...
Click to collapse
Check this out, I hope this helps a little http://forum.xda-developers.com/showthread.php?t=1674551
Something that has been annoying me since the day I bought the tablet (LTE SPG 521)
When the tablet has been idle for a while, the WiFi turns itself off.
So whenever I pick it up without thinking, open chrome to start web browsing, I am connected to internet, and things are fine until I realise that I have been using 3G instead of WiFi.
Most of the time I need to go into shortcut quick access from pulling down top right corner and turn WiFi on.
Sometimes I need to go into WiFi settings and turn it on, even though the quick access shortcut says WiFi is on.
I do have stamina mode on, but have disabled every other power saving feature related to WiFi. In fact it is the same setting on my Z Ultra and Z1 Compact, but needless to say, I do not see this behaviour on my other sony devices.
But somehow on the tablet, WiFi does not auto connect, even in presence of a WiFi router that is set for auto connect.
Even If I was using the particular access point for WiFi connection, lets say I play games for about 30 minutes... the connection is lost and I need to go into WiFi settings to turn it on again (with the small slide to the right toggle switch within WiFi settings to turn on WiFi itself).
Anyone else experiencing this?
I would rather avoid it, since over usage on 3G for me means speed throttling later in the month...
P.S. Yes, I am on latest firmware 17.1.A.2.69
On Advanced WiFi, Keep wifi on during sleep is set to ALWAYS., avoid poor connection is turned OFF, and Wifi optimization is also OFF
Factory reset it? That's probably the first thing they tell you to do if you approach the technicians, if the problem still persist then demand for an exchange if not refund it.
I'd just bought mine today and unfortunately the bottom right corner the glass sticks out and it is pushable. I'm going to exchange it tmr.
Sent from my C6603 using XDA Premium 4 mobile app
Thanks for the idea, but no luck.
In any case each time I upgraded firmware, it should have sorted itself out, but problem still remains...
"Factory reset" is always the first "solution" you get by "technicians". Usually translates to: "Keeps the customer occupied for hours, silencing him."
Regarding the issue: I cannot confirm that, NO WLAN issues with my LTE Z2, it's just "always on", never losing the connection.
Chefproll said:
"Factory reset" is always the first "solution" you get by "technicians". Usually translates to: "Keeps the customer occupied for hours, silencing him."
Regarding the issue: I cannot confirm that, NO WLAN issues with my LTE Z2, it's just "always on", never losing the connection.
Click to expand...
Click to collapse
Do you have stamina mode ON?
With my other Xperias, the second I turn my screen on, the wifi is off/sleeping, but it launches and connects almost instantaneously. I guess the problem in my tablet is that it is not doing so, requiring me to do it manually...
I thought the FW for the tablet and the phone Z2 was the same? Maybe I should go and look in the forums over there...
I don't have the problem, either.
UPDATE
Problem Solved.
The cause was ad blocker app that I had installed, and it seems to me that whenever I was using certain apps that needed ad-blocking, all this thing would do is turn wifi off (but not 3g/LTE)
How Dumb is that?
Anyways, Wifi now always on even with stamina mode on.
Thanks for all who listened and threw suggestions!
Thanks
jewelkobayashi said:
UPDATE
Problem Solved.
Click to expand...
Click to collapse
Thank you very much for sharing this with us. Too many others just keep silent if they found the reason of their problems.
I'm trying to figure out if my Edge is bad. When I turn the screen off, and come back to the phone a few minutes later, I'll get a notification stating it has connnected to my router. I've checked the settings and it states the wifi is set to be always on. I attempted a factory reset and still no luck. Sometimes it'll take a few moments before it even connects to the wifi again upon turning the screen on.
Do I have a bad phone?
vaxick said:
I'm trying to figure out if my Edge is bad. When I turn the screen off, and come back to the phone a few minutes later, I'll get a notification stating it has connnected to my router. I've checked the settings and it states the wifi is set to be always on. I attempted a factory reset and still no luck. Sometimes it'll take a few moments before it even connects to the wifi again upon turning the screen on.
Do I have a bad phone?
Click to expand...
Click to collapse
I would check under the advanced settings for wifi, there's an option for what to do with wifi during sleep. That may be your problem.
I've already checked and it''s enabled.
vaxick said:
I've already checked and it''s enabled.
Click to expand...
Click to collapse
I have the same thing happening. I noticed when I was backing pics on one drive
. It would always say that back up has stopped because there was no WiFi After turning the screen on again.
I just got my Edge yesterday, and I am having the same problem with wifi AND also that it stops seeing any wifi and I have to toggle it off and back on manually THEN it will instantly connect to my known network.
Dear @vaxick,
Dial *#0011# and click on more>>WiFi>>"WIFI Power save mode" try to disable this option and see what happens.
*it might drain your battery faster.
Regards
bluff master said:
Dear @vaxick,
Dial *#0011# and click on more>>WiFi>>"WIFI Power save mode" try to disable this option and see what happens.
*it might drain your battery faster.
Regards
Click to expand...
Click to collapse
Thank you for this suggestion, unfortunately it had no effect as I have observed the same wireless disconnect behavior now with both the WiFi power save both on and off. Once the wireless disconnects it no longer see ANY wireless networks no matter where I go until I toggle the wireless off then back on again. Then it will see all wireless network present around me and instantly connect if there are any of my saved networks present. At this point I believe it is either a hardware or worse a software problem with my phone, but I am really at a loss to the exact nature of this issue.
Mine also has this issue when connected to 5GHZ SSID. Connecting to my 2.4GHZ SSID solves this problem completely for me
dazbutler1 said:
Mine also has this issue when connected to 5GHZ SSID. Connecting to my 2.4GHZ SSID solves this problem completely for me
Click to expand...
Click to collapse
I hope that this is a hardware issue with my phone, as your "solution" is totally unacceptable for me, especially since my work place has bandsteering AP's that use the same SSID's for both 2.4 and 5GHz.
Moguledyouth said:
I hope that this is a hardware issue with my phone, as your "solution" is totally unacceptable for me, especially since my work place has bandsteering AP's that use the same SSID's for both 2.4 and 5GHz.
Click to expand...
Click to collapse
Yeah, i have to turn WIFI off whilst at work for the same reason. Certainly hoping it's just a software bug and will be fixed quickly as it is by no means an ideal workaround
I also see this kind of problem since last 1 week, here is how i noticed. i user viber messaging app and it shows status online if you are connected. Lot of my friends started complaining that my status is not continuously online and fluctuating so i started doing tests.
Moment my display turns off i started counter and in 10 minutes my status changes as last seen and whenever i open viber app again i am online.
second test: i tried doing the same with whatsapp and connected at web.whatsapp.com and same thing happens within 10 mins i see yellow bar appearing that my phone is disconnected so again i have to open whatsapp on phone to reconnect.
this is very annoying to see this kind of problem on new phones, especially when old phones are working flawless.
Kind of the same problem, but with GPS. Once I disabled the battery saver mode, it stopped disconnecting. Have you tried that?
Are you referring to power saving mode in battery settings. i did check and they are turned off. No idea what else i am missing here.
I tried re-installing viber but still after 10 mins its keep disconnecting.
WiFi >> More >> Keep WiFi on during sleep >> Always
Problem solved
Sent from my SM-G925F using XDA Free mobile app
vvally said:
WiFi >> More >> Keep WiFi on during sleep >> Always
Problem solved
Sent from my SM-G925F using XDA Free mobile app
Click to expand...
Click to collapse
I'm having the same issue on my regular non edge s6. This settings is not doing anything have it on always still always drops the wifi when going to sleep. Its driving me crazy no idea why its doing this
i did check and i have Keep WiFi on during sleep >> Always option but still drops, no clue whats wrong with my phone.
I had the same issue and solved it by changing my routers security from WPA2/Mixed Mode to WPA2 Personal. Since this change, it works fine on both 2.4 ghz and 5 ghz.
dazbutler1 said:
Yeah, i have to turn WIFI off whilst at work for the same reason. Certainly hoping it's just a software bug and will be fixed quickly as it is by no means an ideal workaround
Click to expand...
Click to collapse
I received my Galaxy S 6 edge a week ago and I am having this same peculiar reconnecting issue to WiFi that has been described here.
Solution?
I was having this same issue and was unable to find any good solutions for it online, but eventually found something for me that worked through experimenting:
Find the above mentioned "Keep Wi-Fi on during sleep" option (which is probably set to "Always" already), change it to "Never", and then change it back to "Always". Since doing this I haven't had it disconnect from the wi-fi once, where as before it would do it everytime the screen had been off for a few minutes.
The problem started happening sometime after I played with power saver mode, so I think it might be related to that. I know that the software has some other bugs related to power saving mode, as I had a previous problem where my softkeys stopped vibrating or lighting up, which ended up being related to not exiting ultra power saving mode correctly and was fixed by going re-enabling ultra power saving mode and exiting again.