s4 GT-i9505 Bluetooth/Wifi problems - Galaxy S 4 Q&A, Help & Troubleshooting

Hi
I have an issue with my Samsung Galaxy S4 GTi-9505 with Cyanogenmod 12.1 where having Wifi and Bluetooth enabled causes one another to stop working.
I believe this was a known issue but the net is strewn with out-of-date information and forum posts and I just cannot seem to find out whether or not there was ever a solution.
The actual problem is if I have both Wifi and Bluetooth enabled, connected to Wifi but no bluetooth device the Wifi will drop after a few minutes and will switch from 'Authenticating...' to 'Saved' over and over. Switching off the Bluetooth will allow the Wifi to stay connected. Switching off the Wifi and turning it back on will allow the Wifi to stay connected for a few minutes. If I am streaming music to my car's head unit via Bluetooth with Wifi enabled I'll get broken stuttery audio with occasional Bluetooth crashes.
Specs and stuff:
Samsung Galaxy S4 GT-i9505
Cyanogenmod: 12.1-20151106-Nightly
Modem/Baseband: XXUHOF2
Physical environment: Wifi 54G access point
Maybe relevant: open plan office with other random Bluetooth devices kicking around.
Any help would be much appreciated. Thanks.

Related

Share phone connection with TF101 via bluetooth

Hi, as the title said, I’d like to know what app are you using to share your phone’s 3G connection with the TF101 using bluetooth.
I tried everything but none works. Pdanet, etc.
And every single app does only wifi theter, not bluetooth.
Simply, i don’t know what to install on my Galaxy S2; I’d buy anything if sure that it’d work.
Does your phone model not support wireless hotspot??
Just saw that it is a galaxy s2, which means it should support wireless hotspot..you should root your galaxy and flash a rom with wireless hotspot hack enabled, no app needed.
First you'll have to root your Galaxy SII, if you're not ready/able to do that you can't really use bluetooth for tethering (I haven't found one that works WITHOUT root)
Thanks guy, buy my galaxy s2 is rooted since the first day I got it, and by the way here where I live the wireless hotspot is not disabled, it works also without root.
I don’t want to make my phone become an Hotspot, because it waste a lot of battery. I’d like to share connection via bluetooth so I can keep it always on without enormous battery drains. Which one do you use, No_u?
Here's the steps I performed to use Bluetooth internet sharing with my Motorola Milestone 2. I learnt that from a friend who paired an Asus Slider with his iPhone, so I'm pretty sure Samsung Galaxy S2 will be able to support Bluetooth internet sharing without root..
One-time set up (configure Bluetooth pairing)
- Turn on Bluetooth on both devices
- On Galaxy S2 (or other smartphone which support Bluetooth internet sharing profile), activate "Discoverable" mode.
- On Asus TF101, (under Bluetooth settings menu ya?), search for the smartphone and select to pair.
Every time when you want to activate internet sharing via Bluetooth
- Turn on Bluetooth on both devices,
- On Asus tF101, under Bluetooth settings -> Paired devices, press on the smartphone to 'connect
Done! Enjoy internet via smartphone Bluetooth.
wanzer said:
Thanks guy, buy my galaxy s2 is rooted since the first day I got it, and by the way here where I live the wireless hotspot is not disabled, it works also without root.
I don’t want to make my phone become an Hotspot, because it waste a lot of battery. I’d like to share connection via bluetooth so I can keep it always on without enormous battery drains. Which one do you use, No_u?
Click to expand...
Click to collapse
TF101 support Bluetooth Tether (use phone as modem) with bluetooth PAN profile.
When pair with a phone has bluetooth PAN profile (it has 1 more icon in device list, just like A2DP profile has a headphone icon), just click on it to connect.
Many phone have bluetooth DUN profile (Dial-up Networking) but just a few have bluetooth PAN profile (personal area networks). I bought a SonyEricsson Cedar J108i for this function
You have to search in user manual, phone wiki page, ... to know what Bluetooth profile is supported.

[Q] Bluetooth not working

Has anyone experienced that the Bluetooth completely stops working on this phone?
It seems when a certain bluetooth device gets out of range from the phone and momentarily reconnects, while this process happens for quite number of times.
The Bluetooth seems to stop functioning completely until the phone is rebooted.
That is to say, the bluetooth menu and on/off switches will appears to be working but none of the paired bluetooth devices can connect to the phone.
The Scan function in the Bluetooth settings page also becomes useless where it will appear to be scanning but will not find any near by devices.
The same with that check box "Tap to make visible to nearby devices", another device will not find the phone's bluetooth signal.
It looks like the kernel module for bluetooth radio has crashed, after prolonged period of paired bluetooth devices DoS the phone's bluetooth with very weak bluetooth Connect signals (when it becomes out of range)......
This bug seems to be problematic because whenever I have my devices charging in separate places this problem start to appear within a few hours after charging.
Most of all this is very annoying because you will need to reboot the phone to get bluetooth to function again.
And I will not factory reset my phone just because of this annoyance.
It looks like that there's a major issue in the hardware or kernel itself.
This problem started happening when I got the Asus ZenWatch. The problem is apparent if the phone and the watch are almost out of range to each other but repeatedly reconnects once in a while.
This looks very much like the main reason for crashing the Samsung Galaxy Note4's Bluetooth Kernel module...............
I am making the assumption that the Bluetooth Kernel module has crashed because another device does not detect signal from the phone's Bluetooth radio.
I have same issue with my SM-N910C variant, simply BT doesn't turn on.
bluetooth shuts itself off after 2 minutes. you need to check the box again after 2 mins. annoying but not the end of the world.
existing paired devices pair normally regardless. ive never seen it crash or freeze.
The bluetooth on this phone is terrible. Quite honestly, this is my only gripe about this phone. I have to connect/disconect bluetooth several times in my car before it stays connected. While connected, every few minutes the audio will drop out for approx 2 seconds and then come back on. Also once every few hours right in the middle of streaming audio while driving, for no apparent reason, the phone just decides to disconnect bluetooth altogether. Very Very frustrating.
I'm having the following dmesg messages related to bt init:
01-18 12:04:50.748 19152 19164 E bt_upio : set_bluetooth_power : write(/sys/class/rfkill/rfkill0/state) failed: Operation not permitted (1)
01-18 12:04:50.748 19152 19195 E bt_hwcfg: Start CFG HW, HCI reset
So sad that there is not a solution right now.
hiperjp said:
I'm having the following dmesg messages related to bt init:
01-18 12:04:50.748 19152 19164 E bt_upio : set_bluetooth_power : write(/sys/class/rfkill/rfkill0/state) failed: Operation not permitted (1)
01-18 12:04:50.748 19152 19195 E bt_hwcfg: Start CFG HW, HCI reset
So sad that there is not a solution right now.
Click to expand...
Click to collapse
The problem was the range and a weak or intermittent signal.
Since I changed the leather band to a stainless steel one which I believe boosted the watch's bluetooth coverage.
This time the phone's bluetooth does not go down anymore.
Now, I am not sure if the watch's coverage or antenna too short causing this issue.
Or something wrong with this phone's bluetooth...

i9505 wifi bluetooth reciever distance minimal

hi,
I refurbished my s4 i9505. I found the phone no longer pick up wifi and bluetooth signals further than a few meters away from the device.
i thought it might have been the antenna cable but it was not.
if someone can help it will be much appertained.
tried safe mode, reboot, circuits look algood, connects fine, similar behavior from the Bluetooth.

Any ROM/KERNEL/RADIO/Combo that will guarantee stable WiFi and Bluetooth?

I've been using Nexus 4 for 4 years now and only last year I began to need bluetooth in it for BT Keyboard and a mouse. That's when I discovered problems with this phone.
Using bluetooth and Wifi at the same time was impossible - WiFi would disconnect and I'd have to reconnect it manually each time - so I used a WiFi watchdog-reconnecter app for that, but still it was really annoying and caused few seconds internet outage each minute.
Then few months ago I've started using a smartwatch with smart notifications via bluetooth - and Nexus had problems with pairing and then with keeping the connection with the watch - it would randomly disconnect or I'd have to reboot the phone to try and connect the watch again. Watch automatically scans for the phone and tries to autoconnect to it - but Nexus is so terrible at it. I've tested the watch with other smartphones and none had these issues - all was flawless.
These problems all occured for me on all ROMs I've used with Android 4.4+ and I've tried stocks, EuphoriaOS, Chroma, PureNexus and now DirtyUnicorns. If I remember well, I had better bluetooth times with Chroma, but that I'll have to test again to make sure.
So guys here are my questions:
1. Do you know if Nexus 4 WiFi/Bluetooth problems were ever finally solved with a patch?
2. If you can relate your position to mine (using a smartwatch or something else that needs to reconnect to the phone automatically) then do you have these problems? If not, which ROM are you using and which kernel?
3. I've read that kernels don't matter in bluetooth and that it's mostly ROM based issue? Is that true, or maybe a specific kernel helps for these problems?
I'm using bluetooth to play music.
In the past I've had issues with audio cutting out over bluetooth on the official firmware. At some point it got fixed but I cannot remember when exactly.
Right now I am using PureNexus 6.0.1-20160311 and the audio problems came back.
That's all I can say but I did have a reliable ROM in the past.
Edit : I just installed the latest CM13 snapshot (2016-04-29) with Hellspawn r12 and Bluetooth audio stopped skipping.
I'm on the Resurrection Remix ROM, with no problems but I only use Bluetooth for the occasional file transfer.

N6P MM6.0.1 Spontaneous Erasing Of ALL Bluetooth Connections

Hello,
So I have not seen this one listed... I have been running into a VERY obnoxious intermittent Bluetooth issue. I'm very curious to know if anyone else has had this happen or is having this happen and if ANYONE has any sort of workaround/fix/thoughts/help! I posted this on my car forum as well since it only happens when connected to one of my cars:
All,
I'm having a terrible issue with Bluetooth on my 2015 S85. I'm concurrently working on the Android side to also research.
The problem is with my Nexus 6P running Marshmallow 6.0.1. This is why I'm fearing it's a narrow issue, how many of you who have a Tesla also have a Nexus 6P?
Issues:
1. Bluetooth connection is terrible between this car and my phone. The Bluetooth drops frequently and does not reconnect, or during a call it will just go silent even though it is connected. I am not pressing mute nor anything else to trigger this other than answer the call via the vehicle
2. The really bad problem I am experiencing is where somehow my phone is wiping ALL bluetooth connections when it connects to my vehicle (intermittently this is). This would be a minor inconvenience if I did not have existing bluetooth connections for various other devices, vehicles, watches, etc.
Has anyone else experienced these issues? Can anyone offer any sort of solution or work around/suggestion other than NOT connecting the phone to the Tesla? It is only with this car that my multiple connections get wiped.
Thanks

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