S9+ USB disconnect issue - Samsung Galaxy S9+ Questions & Answers

I am having an issue where my S9+ intermittently disconnects from USB devices. Done the obvious thing of trying multiple USB leads but this does not change anything.
Flying a DJI drone that uses an android app connected via USB to a remote control unit. Maybe one in ten flights the USB feed from the Remote Control to the S9+ gets cut, making flight control problematic.
VW car with inbuilt Android Auto occasionally loses the USB connection and stops functioning.
In both instances no amount of re-plugging the USB C lead or rebooting the phone or android app fixes the issue. However as far as I can tell, in all cases power cycling the connected device, be it the Remote control for the UAV or the the VW radio (Car off for several minutes), immediately fixes the issue.
Does any body have an idea of what would cause the S9+ behave like this. Chopping the USB out of the blue. Seemingly the S9+ no longer recognises the specific device that is in plugged in to it and the associated app UNTIL the peripheral device is power cycled. Could this be the "Optimize Battery Usage" function running amok. Have disabled it for both apps but it is too early to tell if it has fixed it .

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[Q] Bluetooth auto connect

I can't see any option anywhere in my SGS2 to set a BT paired device as "authorized". Every time I enter in my car I've to manually select the BT device and start manually the connection.
I searched in the forum but didn't find answers.
I also tried to look at the filesystem and I found auto_pairing.conf file in which there are a lot of BT manufacturer brands listed in sections like "black list", "white list", .... Is it possible I need to manually modify this file to include my BT manufacturer in the white list section? It sounds really strange!
Is there any other way?
I'd love to know that as well.
I atlculay lvoe my sumnasg glxaay s2 wtih VliaRionlm mroe tahn my xobx
Update
I manually modified auto_pairing.conf file adding my car BT manufacturer without any success (I added it in white list with the name already mentioned in the file, so I think that's not a problem of brand name).
My SGS2 continue to ask me to manually select the device to connect to, even if only one BT device is available (car handsfree).
I have the same problem, which i didn't have with my Nexus One running Cynogenmod ROM. I keep my Bluetooth on all the time or most of the time and i would like (like i had in nexus one) when i turn on my car (with Sony MEX-BT3700U car stereo with Bluetooth) that the phone auto-connects with the stereo in a minute or less (or with my plantronics headset when i turn it on), but no, every time i have to go into bluetooth settings and connect on the paired device and then it's connected.
I heard about few application that could help but it would be nice to have it as native function on the phone. I haven't tried these apps yet but if anyone want's to try they can be downloaded from the market, firs is free, the second is not.
https://market.android.com/details?id=a2dp.Vol&feature=search_result
https://market.android.com/details?id=com.btautoconnect&feature=search_result
If anyone can help it would be greatly appreciated
I don't have this problem at all, on any ROM I've tried stock or not. Is your stereo also set up to auto-connect? And is it your phone or your stereo that's refusing the auto connection?
mudferret said:
I don't have this problem at all, on any ROM I've tried stock or not. Is your stereo also set up to auto-connect? And is it your phone or your stereo that's refusing the auto connection?
Click to expand...
Click to collapse
Stereo doesn't have any options, same as Plantronics headset (only ON or OFF), that means that with my old nexus one running CM (or Nokia n95 8GB) when the bluetooth is switched ON and i come near stereo or headset they connect automatically in about 30 seconds max, with my SGS 2 that doesn't happen, i tried everything but it wont auto-connect until i initiate the connection from phone manually.
I have to resolve this because it's killing me !
jartukovic said:
Stereo doesn't have any options
Click to expand...
Click to collapse
I wonder if that's the issue; IIRC it's my stereo that I've told to connect automatically rather than my phone. I'll verify on my commute home today.
Mine auto connects to my JVC car head unit, but doesn't to my Belkin Tunestage. No idea why. As it happens, this suits me but it'd be nice to be able to control it.
And the commute begins. The auto connection is an option on my JVC deck, no such option on the phone.
Sent from my GT-I9100 using XDA App
mudferret said:
I wonder if that's the issue; IIRC it's my stereo that I've told to connect automatically rather than my phone. I'll verify on my commute home today.
Click to expand...
Click to collapse
The stereo is recognized same as Plantronics and that is as a head set, but it doesn't want to automatically connect to either of them, every time i have to initiate the connection. There is one way to connect it (partially automatically ) but that's not the solution - i have to turn on the bluetooth on my phone before starting my car, then when phone is in searching mode if the car is started (stereo turned on) then it will connect automatically, if the search mode (that is active for a short time after turning the bluetooth) ended before i start the car (for instance if i keep my bluetooth on all the time on my phone) then it wont connect automatically.
Am i any clearer about my problem ?
I hear what you're saying but it appears that auto connection is initiated by my stereo. If I turn auto connect off on my stereo there is no connection until I tell my phone to connect. I don't see anything on the gsii settings to have the phone auto initiate the connection. I have a recent JVC deck fwiw.
Sent from my GT-I9100 using XDA App
I will check one more time is there any bluetooth settings on my car stereo, but i'm 90% sure that it doesn't have, because this is the first phone that doesn't connect automatically.
I have had similar issues with mine, it will pair with my Kenwood DNX520VBT but wont auto connect.
however i now have a workaround
Turn bluetooth on your GS2 first, then turn on you Radio. once my Radio boots up it initiates the connection and auto connect works.
if i turn on the bluetooth on my GS2 after my radio it never works.
ive got a sony bt3700 stereo, it connected perfectly with my samsung wave, i just upgraded to a galaxy s and i have to do it manually every time so its not the stereo.
Same thing happened to me, old nexus one with CM7 is connecting ok but i have to connect SGS2 manually or make sure that my bluetooth is ON on my phone before i start the car.
I may have the answer......
Hi,
I have a sort of work around.
My Pioneer head unit refuses to auto connect to my SGS2 and I have to do it manually (I connect from the radio in 4 clicks but thats not the point). This was driving me nuts as previous handsets I owned connected within 5 seconds of being in the car.
I then discovered ROMS and went for the Criskelo ROM and it put me on Android Version 2.3.6 (Not sure if that made a difference or its actually the ROM).
Now with that sorted I found that I have an extra function in my bluetooth settings. When I make the device visible I can then choose the visible time-out length. If I set this to NEVER then I have no problems connecting to the headunit everytime I get in my car.
The only problem I have with this is that I pop my phone into Airplane Mode each night and because that disables the bluetooth it loses the time-out setting so I have to put the time-out back to never each morning.
With setting the time-out to never I'm not sure what battery drain is like because I'm constantly on my phone and my battery depletes rapidly anyway but it seems like a fix for now.
I hope this makes sense and helps people out until a proper fix becomes available.
Cheers,
DJ Sploits
Hi All,
Sorry for bumping an old-ish thread, but it seemed the most appropriate thread, and better than creating a new one of the same topic!
This is what I believe to be true:
*IF* Bluetooth is enabled on the GS2 (and the phone has previously been paired with the car headunit) then when the car is turned on, it will auto-connect to the GS2
*IF* Bluetooth is NOT enabled on the GS2 (and the phone has previously been paired with the car headunit) then when the car is turned on, it will NOT connect to the GS2 (understandably!).
*IF* the phone has previously been paired with the car headunit, and the bluetooth on the GS2 is enabled *AFTER* the car has been started, it does NOT Auto-Connect.
From this, I assume that when the car is powered on, it searches for previously paired handsets in order of most recently connected first. If it finds one, then it WILL connect.
Now:
If I leave Bluetooth enabled on my phone, the battery is significantly depleted my mid-afternoon.
I've started using an app which uses the "rough location" (not GPS) to monitor where the phone is located. If it deemed to have moved in X period of time, then it enables bluetooth.
This is great, and works a charm ... BUT it does mean that bluetooth stack on the GS2 is enabled AFTER the car has been moving for a period of time, and thus does NOT auto-connect.
What I've been searching for is:
"When BT stack is enabled on GS2, can it look for previously paired devices and initiate the connection itself?" (Rather than the car connecting to it?) Is there a script or app to do this?
Hi WTFH,
I think it might be more headunit specific. I always have my bluetooth on but it wont connect automatically to my headunit unless I have it set to constantly discoverable (on the handset).
I also use a power saving program called Green Power Premium which will cut bluetooth/data/wifi after a certain amount of time when the phone is in a sleep state. Its great fro saving power as my phone isnt constantly looking for a wifi signal (I don';t use it to control my bluetooth though as I need it on for my car).
Hey DJ_sploits,
Thanks for that ... Yes, I understand that some headsets do not auto-connect to the GS2 if the phone is NOT visible.
But what does seem to be constant is that the GS2 will not auto-connect to any of the headsets if the bluetooth stack on the GS2 is enabled AFTER the headset has come online and available.
One workaround I'm thinking of is:
Enabling a profile which says "When connected to a power source (I'll have to use the power adaptor) then enable bluetooth". Connecting my phone to the power first before starting the car should enable the BT stack before the headset tries to connect.
In fact I could extend this to say "Only enable bluetooth when using power adaptor, and not connected to wifi".
It's still a pain to do this though, as I tend to just jump into the car and don't want to faff about with connecting this and that.
The only other work around I use is to set the visiblity to constant (depending on what android software version you are on). My headunit always picks the phone up if I have it setup like this. the only thing with that is it will eat the battery even more (which is annoying considering there are other phones out there that constantly have their bluetooth on and you never see the battery getting hammered).
The only flaw I can see in your method is the fact you need a power source to knock on the bluetooth. Great for powersaving but it would then mean you would have to remember to connect it to a car charger everytime you got in the car (not too bad if you have it constantly plugged in to the cigarette lighter) and as you set this can be a bit of a faff.
The only way I can see in sorting this is using a power saving app but having your visibilty constantly on for the bluetooth and then we just hope it doesnt eat the battery too much (not to bad for me as I have a charger at work but could be a pain for others). The only problem with this (apart from the battery issue) is that if you knock the bluetooth off or knock the phone to airplane mode (as I do at nights) then when you knock the bluetooth back on it forgets that you want it to be constantly visible so you have to go through the settings and check the box

Which android device to stay in a car for radio streaming ?

Hello,
I'd like to install an Android device (tablet, smartphone, computer or whatever) into my car.
The purpose is to listen to internet radios and to be able to switch between those radios using my toyota car player which handles bluetooth/A2DP/avrcp .The app I would use is xiialive. This device would have his own sim card and should stay in the car. I don't want to plug the device each time I enter in my car, push any button or whatever. I would just like that the fact to put the key in my car would connect automatically to a webradio.
In fact I don't really need to see the screen, the device could stay hidden somewhere inside the car.
Here are the features I would like :
- auto boot when I turn on the car, which means when the device receives power from the usb port (my car has an usb port)
- plug an external antenna to get a better reception while driving. I'm thinking of a small android computer with a 3G stick plugged in. I have a 3G stick with an external antenna slot. Or any smartphone with an external antenna slot, but I haven't found one so far.
- eventually auto power down when I turn off the car, but If the device shutdowns when the battery is empty, it could be ok too
I've searched for such devices with no sucess. Any help is welcomed
thanks
if its a device that stays plugged in then if its connected to an always on port (on whether the car is or not) you should be all set. you can still place it somewhere you can easily reach on the off chance something happens and you need to manually power it on or reboot it.

USB Audio on Android 8.0.0

So, I have an issue with audio out via USB. On android 7, I would plug an USB into the car headunit connecting it to the phone. In android 8, it doesn't recognize the device. The phone keeps disconnecting, shows android accessory connected, then it disconnects again until the HU throws an error
S7 Edge Exynos running Android 8.0.0 ERC6
Up. I've read somewhere that it has something to do with AOA, and that's not supported in Oreo. Is this the case ?
Same problem here. I've managed to get it working by forcing 'Audio Source' option under USB connection settings in Developer Options, but it has to be manually set each time. So if the head unit or connection freezes (which does happen), you have to physically reconnect and start from scratch. Which can't be done safely whilst driving...

Issue with ANT+ services and Oreo

Hi there,
I have an LGV30 (AT&T), stock ROM
Except the signal issues I am pretty happy with it.
I was wondering if anyone can help me on this one and thank you all in advance.
My issue (since the Oreo update) is when I connect my Garmin USB ANT Stick via OTG cable the phone starts behaving weirdly.
First of all the ANT+ services don't work correctly (as they used to with Nougat) meaning the fitness apps that need the ANT+ sensors cant find them.
And second the Bluetooth icon at the top starts blinking and all Bluetooth devices are disconnected. The Bluetooth cannot be switched on or off anymore. The switch in settings is grayed out and cannot be used.
I think there is some connection/mix up with ANT+ services and Bluetooth radio and in the end none of them works.
The only way to make Bluetooth work again is by unplugging the USB ANT Stick and restart the phone.
What I have tried so far:
Disable all radio connections manually before plugging in the USB ANT Stick. Same result: Bluetooth icon flashing and neither the ANT+ services work or Bluetooth.
Different OTG cable. Same effect.
Different USB ANT Stick. Same story.
Different apps. Same thing.
Tried different modes for the OTG connection: Charging mode , Power supply, MTP etc. to no avail.
The USB ANT Stick on my old Nexus 7 (running stock Marshmallow) works with no issues.
LG V30 ant+
I was never able to get ant+ to work on my V30. That said, by uninstalling all ant+ related apps and clearing bluetooth cache, I was able to connect my Garmin Vector 3 pedals and Wahoo KICKR simultaneously and powermatch using trainerroad. Garmin Connect also worked well.

Bixby Routine with car bluetooth not always activating?

I made a bixby routine as follows: when my phone connects to my car bluetooth (VW Passat), it should do several things. But the problem is that the routine almost never starts working by itself? It only works after I manually turn off bluetooth and turn it back on after im already connected to my car. Anyone else have this problem? With tasker there's no such problem when connecting to my car bluetooth, but i'd like to use bixby routines instead of tasker...
Even though I have another routine which does several things after connecting to my BudsLive, and that one always works by itself without problems.
When you get in the car do you activate "media" on car, or just get in and let the phone connect to car? I have noticed on a lot of devices if you don't "fully" connect to media on car, such as playing streaming music many phones don't see the connection unless Media connected (you can pause music). I'll get phone calls fine, but no messages or Maps audio at all unless Media connected. As I said, same with all my older phones, started I think around Android 9. Think part is car manufacturers don't want to support phone options anymore, they want you to use Android Auto or Car Play and leave the software to Google and Apple.
mt2020 said:
When you get in the car do you activate "media" on car, or just get in and let the phone connect to car? I have noticed on a lot of devices if you don't "fully" connect to media on car, such as playing streaming music many phones don't see the connection unless Media connected (you can pause music). I'll get phone calls fine, but no messages or Maps audio at all unless Media connected. As I said, same with all my older phones, started I think around Android 9. Think part is car manufacturers don't want to support phone options anymore, they want you to use Android Auto or Car Play and leave the software to Google and Apple.
Click to expand...
Click to collapse
The thing is, my car bluetooth doesnt want to activate "media" lol. It only connects for phone calls. When i try to activate media the button always returns back to off. Seems to be a samsung/volkswagen problem since i see alot of posts with the same problem when googling
I had Bixby Routines set up on my S21 to do some things automatically when connected with a car Bluetooth kit. Everything was working fine until the last update of One UI 4.0. After the update, nothing happens when I connect to the Bluetooth kit in the car. I deleted the Bixby routine, reset the app data, deleted the Bluetooth partnership, and reconnected to the car's Bluetooth kit - nothing helped.
When I create Bixby routines using regular Bluetooth headphones, everything works fine. The problem only occurs with the car's Bluetooth kit. While searching the Internet, I found out that there was a similar problem with Bixby procedures before. Back then, Bixby routines would not work if the bluetooth device did not have an audio profile. My BT car kit does not have such a profile, only a hands-free profile is available. Has the old malfunction returned?

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