[FIX] Background WiFi scan causing Bluetooth connection problems - Nexus 4 Q&A, Help & Troubleshooting

Ever since 4.3 rolled out the background scanning on WiFi to help with location updates, I've been having problems maintaining a connection with the Bluetooth in my car. Normally Wi-Fi is turned off while driving but the new scanning feature happens regardless of the Wi-Fi state.
After much experimentation, I've found that turning off that feature seems to allow the connection to be stable.
This occurs only on certain BT devices... Another media receiver I have is always rock solid regardless of the Wi-Fi scan setting.
Has anyone else experienced this issue?
I'm wondering if there's a bug that can be fixed on the android side. The Bluetooth devices that is having problems with 4.3 is circa 2007.
Sent from my Nexus 4 using Tapatalk 4

I'm having the same issues. I'm going to try this later and see if it works.
Sent from my Nexus 4 using XDA Premium 4 mobile app
Update: it didn't work for me.

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[Q] Nexus 4 Wi-Fi issues.

First - Hi all, long time reader but this is the first time I've needed to start a thread - so sorry about my first post being a problem/Q!
I've not had my Nexus 4 long, but have got some pretty annoying Wi-Fi issues. I've searched for answers but it seems that people have different Wi-Fi problems and I just wanted to see whether my issue was a common one and, if so, is there a fix on the horizon?
My issue is that I can connect to some routers but not to others (work, home, most open networks)... when I connect it simply says "saved, secured with WPA/WPA2" but wont then connect.
Phones running stock 4.2.1 with franco kernel r28 and the things I have tried are:
Resetting routers
Assigning static IP address
Wi-Fi direct from my Nexus 7
Cleared cache from recovery
changed the Wi-Fi band from 'Auto' to 2.4Ghz and 5Ghz
Flashed new kernel
Very frustrating and because of my signal the lack of Wi-Fi has made me go back to my old phone while I wait for a fix... which connects perfectly to the networks (S3 running CM 10.1)
Is this a 4.2.1 issue - as seems to be the consensus with other Wi-Fi issues or possibly a hardware issue?
Thanks for any info!
There's one fix you've not tried which might work for you (it didn't for me). You would have to be rooted though, which is going to system/etc/dhcpcd and changing the permission on dhcpcd-run-hooks to read and execute from "others". This help some people out but turns out for me that my router isn't compatible with my phone. (DSL-2780).
I've noticed that some of the mobile devices(eg iPhone 3gs, SGS2) are quite sensitive to wireless channel which your router/ap broadcast on.
Try manually switch to channel 6 or 8 that solved my issue - I don't believe in incompatible routers usually problems are related to config.
It is more complicated with an access to the public WiFi as you can not modify the setup.
Sent from my Nexus 4 using xda app-developers app
paulrawr said:
There's one fix you've not tried which might work for you (it didn't for me). You would have to be rooted though, which is going to system/etc/dhcpcd and changing the permission on dhcpcd-run-hooks to read and execute from "others". This help some people out but turns out for me that my router isn't compatible with my phone. (DSL-2780).
Click to expand...
Click to collapse
Ok, thanks for this I will give it a go and let you know.
sirbagin said:
I've noticed that some of the mobile devices(eg iPhone 3gs, SGS2) are quite sensitive to wireless channel which your router/ap broadcast on.
Try manually switch to channel 6 or 8 that solved my issue - I don't believe in incompatible routers usually problems are related to config.
It is more complicated with an access to the public WiFi as you can not modify the setup.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
I have tried this on the routers which I am able to change the channel of and it didn't change anything.
paulrawr said:
There's one fix you've not tried which might work for you (it didn't for me). You would have to be rooted though, which is going to system/etc/dhcpcd and changing the permission on dhcpcd-run-hooks to read and execute from "others". This help some people out but turns out for me that my router isn't compatible with my phone. (DSL-2780).
Click to expand...
Click to collapse
Just to update.
I've now tried this and still can't connect to the affected Wi-Fi networks, probably going to have to wait for 4.2.2 to see if that fixes it...
I had troubles connecting to my wifi network here in my house, which worked pretty good with my galaxy nexus, what i did and worked was deactivating the option "avoid poor connections" in wifi advanced settings, you should give this a try
Fixed it for me
Chad_Petree said:
I had troubles connecting to my wifi network here in my house, which worked pretty good with my galaxy nexus, what i did and worked was deactivating the option "avoid poor connections" in wifi advanced settings, you should give this a try
Click to expand...
Click to collapse
Thanks Chad, it was driving me crazy the constant data drops I had when trying to listen to streamed audio in XiiaLive Pro. Which worked flawlessly with my old HTC Desire.
Did as you said, and perfect now.
sandozer said:
Thanks Chad, it was driving me crazy the constant data drops I had when trying to listen to streamed audio in XiiaLive Pro. Which worked flawlessly with my old HTC Desire.
Did as you said, and perfect now.
Click to expand...
Click to collapse
Glad I could help
Sent from my Nexus 4 using Tapatalk 2
I too have wifi issues with my N4. We have several phones at home - an HTC Aria and believe it or not the SGS1, SGS2 and SGS3!
All of them connect with no problems. My brand new N4 will see the router but refuses to connect until I toggle wifi on/of serveral times in succession, sometimes 6-8 times!
I have avoid poor wifi disabled but it does not help
I really hope El Goog fixes this asap as it is very frustrating.
I've had this issue forever. Android phones hate low or overcrowded signal. Though my nexus 7 always works fine. Makes me think it is the lack of WiFi antenna strength
Sent from my Nexus 4 using xda premium
Its a 4.2.1 issue
http://androidheadlines.com/2013/02/nexus-users-reporting-wifi-problems-on-android-4-2.html
NeXus⁴ using XDA Premium
Nope, i have a 4.2.2 and its same think
i have a problem in my nexus 4 wifi ... it don't connect automatically to wifi network ,, i have to turn wifi off and turn it on to connect !!! any solution ??

[Q] 4.2.2 update, now WIFI probs. Anybody else?

I run my N7_16G_WIFI stock.
I received the 4.2.2 update over the weekend. Now, though my wifi seems to be connected, and you see upstream/downstream animation in the notification area, play music isn't downloading the download queue, but fails. Websites load, but speedtest app fails to complete the searching for server phase. Installing apps from the play store works, eventually, but Netflix, YouTube, and other medium to high bandwidth apps are not. Even my weather app will only load the weather alert page, yet maps, forecast, etc are unusable.
Will test LAN performance to gauge the extent of the problem, perhaps related to traffic passing through the gateway. No other devices on the network are affected, however. I usually stream files from my DLNA server with no problem, so I can test that tonight.
Has anyone had any issues with flaky WIFI after the update? I had no such issues before.
I've been having constant disconnect/auto reconnect after the update to 4.2.2. No other device on my network is having this issue though.
Sent from my Nexus 7 using Tapatalk HD
Dang
My wi-fi was flawless before the update and is just as good after 4.2.2. I sincerely doubt the update caused a problem if it installed correctly. Many posts refer to fixing wi-fi issues by updating/resetting the router. I have a pretty new router with the latest firmware update.
Groid said:
My wi-fi was flawless before the update and is just as good after 4.2.2. I sincerely doubt the update caused a problem if it installed correctly. Many posts refer to fixing wi-fi issues by updating/resetting the router. I have a pretty new router with the latest firmware update.
Click to expand...
Click to collapse
My first thought was it may have been the router as well, but my Nexus has been experiencing constant disconnects on every network I've connected to.
Sent from my Nexus 7 using Tapatalk HD
I'm running 4.2.2 without any WiFi problems.
Sent from my Nexus 7 using xda app-developers app
Woe are we
wrestlingnrj said:
My first thought was it may have been the router as well, but my Nexus has been experiencing constant disconnects on every network I've connected to.
Sent from my Nexus 7 using Tapatalk HD
Click to expand...
Click to collapse
Same here. I expect to have problems in my neighborhood; Urban area and everyone has WiFi. I brought it to work to test on our Meru network, though, and still had the same problem. At work, we are the only building on a 100+acre lot, with saturated WiFi signal. I still had the same issues.
On a factory upgrade, not sure what I could have done incorrectly, since I just tapped "Yes, install" and went to bed.

BLUETOOTH not WORKING WHEN WIFI is TURNED ON AND CONNECTED

aka "Bluetooth kills WiFi"
google nexus 4 4.2.2
Build number JDQ39
When WiFi is turned on, AND CONNECTED, and I make a call using Bluetooth device the connection starts cutting. The WiFi icon in the notification bar disappears then appears again, the radio icon starts connecting/swapping between to 3G or H also the 3G/H icon changes from blue to gray, during this time the connection drops.
If the WiFi is off everything works normally. I talked to Google but no help there, it's like the first time they hear of Bluetooth issues.
The issue is same with stock ROM or AOKP built 5 on NEXUS 4
However, I use the same Bluetooth, voyager-pro hd+, with galaxy nexus 4.2.2 build jdq39 and I have no issues with it. not rooted, stock ROM
Any ideas or fix. If it was something to do with rooting or custom ROM why it was not fixed after I restored it to stock ROM? and why no issues using it on galaxy nexus having the exact same software?
Edit: just tried this on 2nd brand new nexus 4 in our household, not rooted or modified in any way, same issue
OK. THAT'S KNOWN ISSUE https://code.google.com/p/android/issues/detail?id=41631
Google Issue 41631
BLUETOOTH not WORKING WHEN WIFI is TURNED ON
I'm having the same issue. Bluetooth and wifi do not play nice. Not sure if its a software or hardware bug.
funky_snowman said:
I'm having the same issue. Bluetooth and wifi do not play nice. Not sure if its a software or hardware bug.
Click to expand...
Click to collapse
Pulled a Linksys E2500 5GHz router I wasn't using out of the closet, and disabled the onboard routing crap on the uverse 2wire router. Nexus plays nice with bluetooth at home now, even in 2.4GHz mode. Gave me a reason to stop using the uverse crap, but it's still kind of annoying that the N4 is so finicky with wifi. I'll stick it out!
meh, I am returning mine and sticking to my old galaxy nexus. I need bluetooth ON and WiFi ON all the time
will buy it again if fixed or just get n5
No problems with Wi-Fi or Bluetooth together :thumbup: I'm using MW600..
Sent from my Nexus 4 using Xparent BlueTapatalk 2
yyz71 said:
No problems with Wi-Fi or Bluetooth together :thumbup: I'm using MW600..
Sent from my Nexus 4 using Xparent BlueTapatalk 2
Click to expand...
Click to collapse
Do you listen to music only? Do you try to call someone and have productive conversation over the Bluetooth, while WiFi is ON and connected? If the WiFi is ON but connected the problem is not that bad.
I tried with two devices at home, then called a friend, that lives 1000 miles away, with N4. same results. Total of three independent devices tested.
I am using Plantronics Voyager HD+, one of the best headsets out there.
sharkoparko said:
Do you listen to music only? Do you try to call someone and have productive conversation over the Bluetooth, while WiFi is ON and connected? If the WiFi is ON but connected the problem is not that bad.
I tried with two devices at home, then called a friend, that lives 1000 miles away, with N4. same results. Total of three independent devices tested.
I am using Plantronics Voyager HD+, one of the best headsets out there.
Click to expand...
Click to collapse
I use my bluetooth for everything.. And works fine:good:
This happens on my N7 running 4.2.2. I have been using a MOGA controller and a Motorola S10 headset.
Everything with work for about 15 min then my network will disappear. When I go into WiFi, it shows no available networks, even though there are like 15 near me.
The only way to reconnect is to disable Bluetooth. Networks immediately show back up and reconnect. Then I can reenable Bluetooth and continue.
I had this issue with MOGA controller originally and wrote them. They said it is an issue with the N7 and N4 and to disable WiFi when playing games. I tested and the controller is perfect with WiFi off.
Streaming Netflix while paired to wireless headset works for about 15 and then quits. I have to toggle Bluetooth to get another 15 min out of it.
Yeah. My N4's been dropping wifi when bluetooth is in use ever since I got the thing. Got tasker to turn wifi off when bluetooth is connected, and vice-versa... Sad I can't use both. Nice to have a 5GB data plan. Comes in handy. But still, should not need to work around it.
eknight612 said:
Yeah. My N4's been dropping wifi when bluetooth is in use ever since I got the thing. Got tasker to turn wifi off when bluetooth is connected, and vice-versa... Sad I can't use both. Nice to have a 5GB data plan. Comes in handy. But still, should not need to work around it.
Click to expand...
Click to collapse
I can't even get my N4 to connect to the bluetooth in my car if wifi is turned on. It's supremely annoying. Combined with the not being able to turn bluetooth off (because you can't turn it back on without a reboot usually) it's making me hate this phone.
Anyone else have bluetooth connectivity issues with wifi on?
eknight612 said:
Yeah. My N4's been dropping wifi when bluetooth is in use ever since I got the thing. Got tasker to turn wifi off when bluetooth is connected, and vice-versa... Sad I can't use both. Nice to have a 5GB data plan. Comes in handy. But still, should not need to work around it.
Click to expand...
Click to collapse
Tasker - a great solution.
Wish Google/LG fixed this already.
BT/WiFi collisions are a pain in the ass for mobile device engineers. But that's no excuse for Google to sign off on this product with such a bug.
Have excatly the same issue with my N7. According to where I bought it it's a known issue but you can't RMA it since it's a workaround (do not use BT and WiFi at the same time).
It's crap cause I bought the tablet to get rid of cables and use to control my music. Now I first have to download by WiFi and then turn it off to use BT to control my receiver.
NoSkills said:
Have excatly the same issue with my N7. According to where I bought it it's a known issue but you can't RMA it since it's a workaround (do not use BT and WiFi at the same time).
It's crap cause I bought the tablet to get rid of cables and use to control my music. Now I first have to download by WiFi and then turn it off to use BT to control my receiver.
Click to expand...
Click to collapse
If memory serves, Google has actually said this is working as intended and won't be fixed.
wait, so then can someone explain to me how I can stream Pandora over wifi through my Jambox? Is that not possible?
So, anyone got a solution? This is making me very angry!
router
rancatoco said:
So, anyone got a solution? This is making me very angry!
Click to expand...
Click to collapse
Yes, the problem in the united states is with AT&T wifi router. So for people in the USA if you have att router or live in area where you have apartment complexes etc and suspect they use ATT you will have a problem. The solution is to go to WiFI settings > Advanced and choose 5G only. DO NOT use "auto" or "2.4G" option. This solves the problem. In other countries would be some other router problem. the WiFi chip on N4 does not play well with some routers around when operates at all frequencies.
That's why the confusion. some people say "all works fine" other reporting problem not suspicion they have ATT router or live near residency with one.
If you rely on wifi mostly and no 5g option then no solution.
Has nothing to do with ATT router.
I have a WNDR3700 and it happens to me on my N4 and N7's when at 2.4ghz (you can see the (dis)conntects)- moving to 5gig solves it but I loose a lot of range... (Just watch your signal meter when you are steaming over net/BT and switch between 2 and 5g - you will see the difference in behavior)
It's a Qualcomm driver issue that has not been fixed - boo on LG and Google for allowing this to get into their flagship devices and leaving it in this state for so long...
I should fire up my old N1 to stream music... Shame...
I have the same issue. I have a nexus 4 stock 4.3 rooted and if I have the wifi on and connected, when I make a call with my Jawbone Era headset I can't listen well the other person. His voice has a lot of pauses. When I turn off wifi everything is OK. This is very annoying.

How do I disable wifi autoconnect?

I just recently got a Nexus 4 from Google. Running 4.2.2 stock, all well and good.
There is one feature however which I really dislike and which has potential security and privacy issues to be considered: unless I shut down wifi entirely, my phone will automatically connect to ANY AND ALL open wifi networks it finds, using those in preference to cellular data to try to get on the internet. This is.. entirely suboptimal but I have not found a way to stop it. I disabled 'auto notification of open wifi networks' which did what it said, it doesn't NOTIFY me any more, it just silently connects.
Is there a way to prevent such behaviour without having to turn wifi off all the time?
Thanks!
nmlss2011 said:
I just recently got a Nexus 4 from Google. Running 4.2.2 stock, all well and good.
There is one feature however which I really dislike and which has potential security and privacy issues to be considered: unless I shut down wifi entirely, my phone will automatically connect to ANY AND ALL open wifi networks it finds, using those in preference to cellular data to try to get on the internet. This is.. entirely suboptimal but I have not found a way to stop it. I disabled 'auto notification of open wifi networks' which did what it said, it doesn't NOTIFY me any more, it just silently connects.
Is there a way to prevent such behaviour without having to turn wifi off all the time?
Thanks!
Click to expand...
Click to collapse
Forget all remembered networks, and manage how much your Wi-Fi is on. It's a quick tile.
In all my years of owning an android it has NEVER connected to a router I didn't want it to do it's user created
Sent from my Nexus 4 using xda app-developers app
strapped365 said:
Forget all remembered networks, and manage how much your Wi-Fi is on. It's a quick tile.
In all my years of owning an android it has NEVER connected to a router I didn't want it to do it's user created
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Thank you. I have owned several Android phones, this is the first one that behaves like this. The only thing I'm unclear on is 'manage how much your wifi is on'?

[Q] WiFi issue with Connectify hotspot

Hi all,
Been using my GT-i9505 for a while now completely fine. Used WiFi fine etc. However I've moved back to uni where I don't get WiFi and so I use connectify via my laptop and a wired connection to transmit a WiFi signal. I've used this for a few months perfectly fine for my iPhone and tablet (transformer infinity).
The issue that arises is that my gs4 connects fine and stats connected no issues. The data arrows flash orange and green but the data seems to stop working.
Best example is whatsapp which will not send messages or at best has a huge delay.
I rectified this by turning off Wi-Fi power save which fixed the issue but is bit really a fix SD this literally ate battery like nothing else. So wondered if there is s fix or anything I can do phone or computer side to fix this?
Sent from my GT-I9505 using xda app-developers app
I've the same problem with you. Until now I don't know how how to fix it. Subscribed your thread.
Sent from my GT-S6102 using Tapatalk 2

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