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Constant connecting/disconnecting when USB plugged in to computer

Got my new GS6 a week ago and now i went to transfer some images and when i connect it to the computer it makes the USB connected sound and suddenly starts disconnecting and reconnecting like crazy, has anyone else experienced this? gotta get my hand on a replacement cable just in case thats the problem..

Yeah it's the cable
soapBro said:
Got my new GS6 a week ago and now i went to transfer some images and when i connect it to the computer it makes the USB connected sound and suddenly starts disconnecting and reconnecting like crazy, has anyone else experienced this? gotta get my hand on a replacement cable just in case thats the problem..
Click to expand...
Click to collapse
Same problem here and mine s6 is only 26 days old.... support told me it's the cable but refused a replacement... what the hell right?

I have the same thing and have tried a few cables. Did you get to the bottom of the issue? My laptop is a dell xps15 and it happens with W8.1 and Mint17 (on the same laptop).

soapBro said:
Got my new GS6 a week ago and now i went to transfer some images and when i connect it to the computer it makes the USB connected sound and suddenly starts disconnecting and reconnecting like crazy, has anyone else experienced this? gotta get my hand on a replacement cable just in case thats the problem..
Click to expand...
Click to collapse
its the cable.. same issue here..when I use a ps4 controller-cable i have no problem

Yea... I think it has a lot to do with the placement of the port on the phone and and a filmsy input. I tried tried a sturdier cable and it works waaaaay better.
Samsung support did offer to send me a prepaid envelope for my cable. ... then wait 2 weeks for testing... then if it was found to be defective a replacement would be shipped free of charge, but if it was defective due to user abuse then they said they'd send me a repair bill........... SERIOUSLY wtf?
I'm not kidding, this was their solution when I spoke to support.

Well it really was the cable, went out and bought a new one, exactly the same and it works fine, so the one i got in the box was faulty, after some googling it seems this has happened to a fair bit a of people already,
i still use the crappy cable to charge with... although it did stop charging half way through once :silly:

It's a USB Power setting
1. Go to Power Options on your computer
2. Click 'Change plan setting' on your chosen plan.
3. Click 'Change advanced power setting' on your chosen plan.
4. Expand 'USB Settings' .
5. Expand 'USB selective suspend setting' and change it to disabled.for On battery and Plugged In

[email protected] said:
It's a USB Power setting
1. Go to Power Options on your computer
2. Click 'Change plan setting' on your chosen plan.
3. Click 'Change advanced power setting' on your chosen plan.
4. Expand 'USB Settings' .
5. Expand 'USB selective suspend setting' and change it to disabled.for On battery and Plugged In
Click to expand...
Click to collapse
I tried this and still it doesnt work. I changed the cables , I changed the PC which I am connecting to and still no fix. I keep getting disconnected continuously.

I'm having the same problem with Galaxy S7. It keeps disconnecting data after it has been plugged in a few seconds. It's not a cable issue, I've checked on 8 different cables.

BaconMage said:
I'm having the same problem with Galaxy S7. It keeps disconnecting data after it has been plugged in a few seconds. It's not a cable issue, I've checked on 8 different cables.
Click to expand...
Click to collapse
Flash a different ROM. I had this on my s6 e+ on stock nougat. I went to Dr ketan ROM and it stopped

I heard it could be due to using a fast charging cable. The phone attempts to draw out more current than the USB port of the computer allows, forcing it to disconnect/reconnect repeatedly. Try using an older/less-current-rated cable. Alternatively, if you don't actually need to access the files and are just charging the phone, you can go to Window's Auto Play (search in start menu) and set your phone to "Take No Action"

I wanted to throw out a few other tricks to try, for whoever comes across this old thread when googling.
I don't 100% have an idea of why this happens, or why this worked, but it did.
First thing is, the cable really does matter. If you're using a cheapo cable that doesn't do fast charging, or a data-only cable, get a nice cable. If you're using a nice cable, try a non-fast-charge cable or the one that came with the phone.
My fast-charging cable has worked for a while but I recently tried to transfer a large 2 gig movie to the phone's secondary SD card, and it kept disconnecting / timing out.
What worked for me is go to developer options (google it, there's some code you have to enter to unlock these settings) and then usb debugging. It was disabled and I enabled it. The transfer then worked smoothly.
Weirdly, another transfer right after did NOT go smoothly, and the fix for me was to disable usb debugging, then enable it again. Then the file transferred normally, even though it took a few minutes.
Lastly, one file refused to transfer that was sitting in a particular folder. I'd get an error instantly. The folder was the cache folder for a popular video downloading app. Even a tiny text file from that folder, refused to copy. But files from other folders worked. I finally figured out that for whatever reason, the phone (or maybe windows) didn't like copying straight from this folder. Not sure why. Some permissions thing? Anyway - I copied the file I wanted from the cache folder, to a folder I use all the time. Then from this new folder to the phone. Worked smoothly, no error.
Hope these tricks help someone.

Android Auto on Mate 9

Hi,
I am not sure if this problem is related to
- Mobile Phone
- Android Auto
- Car
So my question is: Does someone already has a working Android Auto connection with a car´s radio with this phone?
If so, I will continue this in Android Auto section.
Today I upgraded build to: MHA-L29C432B138
Car/Radio: Opel Astra K (MY2017)/ Intellilink R4.0
The connection could be established. But screen of car stays black. When touching screen or saying "OK Google" it accepts voice command.
My Mate 7 works perfectly...
Best regards,
Robert

no idea... working oke on my golf 7 2015 mib2 unit..
u using original cable... i also try ith lumia 950 cable, also usb-c but random disconnecting with this cable.

P9 is also working. I guess the problem is Mate 9.

Mine works with Pioneer but doesn't work well. It Will not play anything already downloaded to the device unless you connect phone to head unit forest and actually play something through Bluetooth first and THEN connect it. All permissions are set correctly etc. And what is with having to give it permission to use the data on the phone EVERY SINGLE TIME?

US model working flawlessly with 2016 VW Golf R... I did have to reinstall audible and spotify after connecting the first time in order for them to show up in the menu, but other than that, no issues with connecting, audio skips, etc. Very happy! Samsung S7 Edge was unusable with AA.

Got the International Mate 9 Pro and AA is working perfectly fine with my Pioneer 4100nex. I'm on the latest Pioneer firmware 1.09 if that helps anyone.

Works like a charm

What settings do you guys have? Do you have usb debugging or anything like that enabled in dev settings? Every time I hook up it comes up with the dialogue box to enable data access. Whether I click enable or not it will not play anything stored on phone. I've had this confirmed by Huawei Australia. They couldn't get it going either.
I have all the correct permissions set for all apps including android auto.
Any hints?

MontAlbert said:
What settings do you guys have? Do you have usb debugging or anything like that enabled in dev settings? Every time I hook up it comes up with the dialogue box to enable data access. Whether I click enable or not it will not play anything stored on phone. I've had this confirmed by Huawei Australia. They couldn't get it going either.
I have all the correct permissions set for all apps including android auto.
Any hints?
Click to expand...
Click to collapse
In developer options I do have "Always prompt when connecting to USB" turned off and "Select USB Configuration" set to MTP. I don't get prompted for anything on the phone. USB Debugging is off. I don't try to play anything from USB though, just use AA, Spotify, and Audible.
Other than that, I do have an Automagic script that when car ui mode is entered, the screen gets turned on, Waze is launched, slide to unlock keyguard is dismissed, and wifi is turned off. I won't need to do most of this when Waze is AA compatible, but until then, I can't live without it. This script works about 90% of the time, still haven't finished tweaking it for 100% success. Worst case, I have to turn the phone back on, swipe down on the notification panel, then select waze from "Notification Shortcuts".

bwillet said:
In developer options I do have "Always prompt when connecting to USB" turned off and "Select USB Configuration" set to MTP. I don't get prompted for anything on the phone. USB Debugging is off. I don't try to play anything from USB though, just use AA, Spotify, and Audible.
".
Click to expand...
Click to collapse
Seems this is possibly the issue. Whenever I connect usb it automatically changes the usb connection type to charge only. Won't let me change it to mtp, audio or anything else. Wonder if there is a hidden setting somewhere in emui that does this... Tried it in dev settings. Same issue. Charge only

MontAlbert said:
Seems this is possibly the issue. Whenever I connect usb it automatically changes the usb connection type to charge only. Won't let me change it to mtp, audio or anything else. Wonder if there is a hidden setting somewhere in emui that does this... Tried it in dev settings. Same issue. Charge only
Click to expand...
Click to collapse
I couldn't find anything else that I changed that seems relevant. I'm just using a standard USB to USB-C cable (Anker PowerLine+) plugged into the USB port in my VW Golf.
Did you change both of those settings I mentioned? If so, when you go back into dev settings does "Select USB Configuration" still say MTP, or did it default back to Charge Only? Maybe you have to reboot after? dunno...

bwillet said:
I couldn't find anything else that I changed that seems relevant. I'm just using a standard USB to USB-C cable (Anker PowerLine+) plugged into the USB port in my VW Golf.
Did you change both of those settings I mentioned? If so, when you go back into dev settings does "Select USB Configuration" still say MTP, or did it default back to Charge Only? Maybe you have to reboot after? dunno...
Click to expand...
Click to collapse
I changed those 2 you said but as soon as I plug in the Huawei cable (thought maybe it needed the Huawei cable) it changes itself to charging...
I'll keep looking into it. Thanks for your help though. This is obviously the issue.

I'm having the same issue in the US version on a 2017 VW GLI. My last two phones worked flawlessly.

MontAlbert said:
Seems this is possibly the issue. Whenever I connect usb it automatically changes the usb connection type to charge only. Won't let me change it to mtp, audio or anything else. Wonder if there is a hidden setting somewhere in emui that does this... Tried it in dev settings. Same issue. Charge only
Click to expand...
Click to collapse
Mine goes to charge only as well however my android auto is working perfectly.

It connects and on the phone side it seems fine but the head unit screen goes black and doesn't do anything.

Hi.. Is there anyway to prevent WhatsApp notifications showing up in android auto?

Mate 9 L29 - B156 in a Seat Ibiza 2016.
Android auto working fine.
You have reviewed android permissions, or if Google app or maps are set to close when the screen is turned off And enable activation?
In my old zenfone 3 that was the problem

Did any of you guys tried to enable the USB debugging mode?

Emil Borconi said:
Did any of you guys tried to enable the USB debugging mode?
Click to expand...
Click to collapse
JA! This was first thing, but no success.
I am also disappointed by Huawei customer care. They just point at Google and say it is not their fault.
Does anyone know how to log / where to find the log when "Force logging" is enabled in dev options in AA?

debart said:
JA! This was first thing, but no success.
I am also disappointed by Huawei customer care. They just point at Google and say it is not their fault.
Does anyone know how to log / where to find the log when "Force logging" is enabled in dev options in AA?
Click to expand...
Click to collapse
Open android auto, go to about, tap the Android auto title 10 times, you will see a toast saying your developer. Now from the 3 dotted menu on the right select developer options locate force logging and make sure it's enabled

Getting Android Auto to automatically connect to car headunit

Each time I get into my car and connect my OnePlus 6 via USB, I have to change the USB connection type on the phone to MTP in order for Android Auto to connect. Once I change the setting and it connects, Android Auto runs well and stays connected until I turn off my car. Without changing the USB setting, the phone will stay in charging mode and Android Auto does not connect.
My car is a 2016 Honda Accord EX and I am using an OEM cable. The phone is rooted, developer options are enabled, and USB debugging is off. When I go into the developer options and try to change the default USB connection mode to something other than charging, the setting change doesn't seem to take.
Is there a way to automatically use MTP mode when I connect the phone to my car? Or something else I can do to get it connected without having to change a setting on my phone each time I get in my car?

I would clear data, force stop, and reinstall Android Auto. I use it every day and have no problems at all. Connects automatically.
My HTC M9 had no end of problems with AA. Would not connect half time time unless I replugged it in, and the voice-to-text function was buggy as hell. My OP6 is smooth as silk.

Thanks. I tried that and even deleted the phone from my car. It didn't work. I had to change the mode to mpt to get it to do the initial connection. Same for reconnecting. Doh!

Do you use Tasker? I wrote a task that will automatically change the setting to MTP. It requires the Tasker plugin - AutoInput as well.

I do have tasker. How do I set it up to do that? Thanks.

theman22 said:
I do have tasker. How do I set it up to do that? Thanks.
Click to expand...
Click to collapse
So I actually created two different profiles/tasks.
1) Detects when USB power is plugged and then opens developer settings and scrolls automatically to usb configuration and makes the change. This profile/task requires the plugin AutoInput.
2) Uses AutoNotification to detect when there is a notification in your tray stating that the device is being charged. Then it will use AutoInput again to click on the notification and change it to 'USB for file transfer'.
I only attached #1. Import it into to Tasker and see if that works. If not, I can add the second option.

theman22 said:
Each time I get into my car and connect my OnePlus 6 via USB, I have to change the USB connection type on the phone to MTP in order for Android Auto to connect. Once I change the setting and it connects, Android Auto runs well and stays connected until I turn off my car. Without changing the USB setting, the phone will stay in charging mode and Android Auto does not connect.
My car is a 2016 Honda Accord EX and I am using an OEM cable. The phone is rooted, developer options are enabled, and USB debugging is off. When I go into the developer options and try to change the default USB connection mode to something other than charging, the setting change doesn't seem to take.
Is there a way to automatically use MTP mode when I connect the phone to my car? Or something else I can do to get it connected without having to change a setting on my phone each time I get in my car?
Click to expand...
Click to collapse
God, it's annoying. It happens in all the modern androids. My S8+ 5T and now my OP6

My OP6 has no issues connecting to my Pioneer AVH-2330NEX. Just plug it in and AA starts right up. Bluetooth is pretty reliable as well, which is how I connect most of the time.

It usually takes a minute or 2 for my AA to come up on my screen (2017 Charger). Once it's connected, it runs super smooth. But I wish it was a little more responsive once I plug in the cable. Now I have to wait for it to come up before I can launch any app (Maps, Spotify, etc)
I"m going to see if the MTP method makes it connect "faster". If so, I'll look into building a Tasker Profile as well like @azsl1326

azsl1326 said:
So I actually created two different profiles/tasks.
1) Detects when USB power is plugged and then opens developer settings and scrolls automatically to usb configuration and makes the change. This profile/task requires the plugin AutoInput.
2) Uses AutoNotification to detect when there is a notification in your tray stating that the device is being charged. Then it will use AutoInput again to click on the notification and change it to 'USB for file transfer'.
I only attached #1. Import it into to Tasker and see if that works. If not, I can add the second option.
Click to expand...
Click to collapse
This is really close. I had to add one more scroll down step in the developer menu and change the mode to MIDI. It doesn't work 100% though. If the developer options menu is already open, it reopens wherever it was and sometimes the scroll down goes too far... Perhaps there is a more stable way to do this?
Attached is my modified tasker profile.

theman22 said:
This is really close. I had to add one more scroll down step in the developer menu and change the mode to MIDI. It doesn't work 100% though. If the developer options menu is already open, it reopens wherever it was and sometimes the scroll down goes too far... Perhaps there is a more stable way to do this?
Attached is my modified tasker profile.
Click to expand...
Click to collapse
I have another profile that uses AutoNotifications to detect when there is a notification in the tray regarding USB charging. It will then use AutoInput to select this option from the notification tray and change it to 'Transfer files'. I can post that here if you are interested. It does require two paid plugins.
You could add a task to clear recents before running the AndroidAuto task - that way it should ensure that Developers Option screen is no longer active.

azsl1326 said:
I have another profile that uses AutoNotifications to detect when there is a notification in the tray regarding USB charging. It will then use AutoInput to select this option from the notification tray and change it to 'Transfer files'. I can post that here if you are interested. It does require two paid plugins.
Click to expand...
Click to collapse
If it works reliably, I'm interested.

theman22 said:
If it works reliably, I'm interested.
Click to expand...
Click to collapse
Here you go. I think both of these Auto plugins have free trials, so you should be able to try it before you buy it.

Disabling USB debugging has helped me

theman22 said:
Each time I get into my car and connect my OnePlus 6 via USB, I have to change the USB connection type on the phone to MTP in order for Android Auto to connect. Once I change the setting and it connects, Android Auto runs well and stays connected until I turn off my car. Without changing the USB setting, the phone will stay in charging mode and Android Auto does not connect.
My car is a 2016 Honda Accord EX and I am using an OEM cable. The phone is rooted, developer options are enabled, and USB debugging is off. When I go into the developer options and try to change the default USB connection mode to something other than charging, the setting change doesn't seem to take.
Is there a way to automatically use MTP mode when I connect the phone to my car? Or something else I can do to get it connected without having to change a setting on my phone each time I get in my car?
Click to expand...
Click to collapse
I replied to you in the other thread, OnePlus 6 and Android Auto
But to fix your issue, this MIGHT be the solution for you specifically. Setup an appointment with your local Honda dealer, and ask to get Technical Service Bulletin 16-059 installed.
This fixed my issue for my '16 Accord when AA wasn't working at all with my PH-1

Or you can just simply choose this option to mtp as default on USB connection. It's in developer settings.

Berlifan said:
Disabling USB debugging has helped me
Click to expand...
Click to collapse
I have read about this and disabled USB debugging. It does sound like it works for some users but it didn't make a difference for me, unfortunately...
surface13 said:
I replied to you in the other thread, OnePlus 6 and Android Auto
But to fix your issue, this MIGHT be the solution for you specifically. Setup an appointment with your local Honda dealer, and ask to get Technical Service Bulletin 16-059 installed.
This fixed my issue for my '16 Accord when AA wasn't working at all with my PH-1
Click to expand...
Click to collapse
I will go ahead and do this. Thank you for the suggestion!
Joyarup said:
Or you can just simply choose this option to mtp as default on USB connection. It's in developer settings.
Click to expand...
Click to collapse
I've tried this as well. The setting does not seem to stick. It sometimes works the next time I plug my phone into my car but the 2nd time I plug my phone in, the default in developer settings is back to USB.

azsl1326 said:
Here you go. I think both of these Auto plugins have free trials, so you should be able to try it before you buy it.
Click to expand...
Click to collapse
This did not work when I tried it today. I'm guessing there is some difference on my phone that would require the setting to be tweaked. I'll look into this.

theman22 said:
I have read about this and disabled USB debugging. It does sound like it works for some users but it didn't make a difference for me, unfortunately...
I will go ahead and do this. Thank you for the suggestion!
I've tried this as well. The setting does not seem to stick. It sometimes works the next time I plug my phone into my car but the 2nd time I plug my phone in, the default in developer settings is back to USB.
Click to expand...
Click to collapse
Didn't know that..

I had the same issue with a VW Passat 2016, and the solution was to enable USB debugging, and after that everything is working ok.
Unfortunately I'm facing another issue. If I'm initiating a call with the phone connected to AA, usually by voice command, the sound is routed randomly on the headset, speaker and sometime to Bluetooth.
Every time I have to set manually from phone app in AA on the car screen to route the sound to Bluetooth, and this is annoying. . Do you experience this issue as well?
Thanks!

Unable to connect to PC in any mode

Hi all, I'm afraid I already know the answer to my question but I'll still ask if there's even a slight chance to get this fixed on my own.
I had this issue on Android 8.1 where my Pixel kept saying "Supplying power to connected device via USB" even without anything connected to it, (it started doing that one day without any reason) tapping the notification allowed me to switch to "Charge this device" and then turn on MTP mode, battery life was terrible but I wasn't that much bothered by it because I am an Android developer so I kept it connected in USB Debugging mode most of the time anyway.
When I got the notification for Android 9 update I decided to update hoping it'd fix the USB issue but after the update it now always says "Charging connected device" and tapping the notification does bring up the "USB Preference" screen and it allows me to switch to "USB Controlled by this device" and it starts charging but there's no way to switch "Charge only" mode to anything else, ADB does not see it, fastboot does not see it and there's no persistent notification on the phone about it being connected via USB at this point (in any mode). My understanding is that this is a hardware issue but Oreo still allowed me to workaround this and get the USB debugging connected.
Is there anyway I can get back to Oreo without using fastboot flash or any other solution to this?
Thanks for reading.
PS. I'm on Ubuntu but I can access a Windows machine if required and bootloader is already unlocked.

I'm curious if you're able to connect to a USB OTG storage device.

I'm having this issue connecting it to my windows 10 laptop.. the cable recognizes it.. starts charging.. shows option on phone to change type of connection.. but not matter which one i change it too, the computer will not pull lit up as a drive to see the files..

Jaws4God said:
I'm having this issue connecting it to my windows 10 laptop.. the cable recognizes it.. starts charging.. shows option on phone to change type of connection.. but not matter which one i change it too, the computer will not pull lit up as a drive to see the files..
Click to expand...
Click to collapse
Same here! I plug the cable into the Windows 10 computer, I even can change the mode from charging to MTP file transfer, but the device won't show up in the Windows Explorer. It appears under connected devices though.

My Pixel 2 XL would not connect to PC for file browsing if USB debugging of Android Apps was enabled in developer settings. Didn't matter which option I chose to connect. IDK if that is expected or not, but it took me a while to figure out. Happened Spring 2018, idk if Google fixed it.

pyro226 said:
My Pixel 2 XL would not connect to PC for file browsing if USB debugging of Android Apps was enabled in developer settings. Didn't matter which option I chose to connect. IDK if that is expected or not, but it took me a while to figure out. Happened Spring 2018, idk if Google fixed it.
Click to expand...
Click to collapse
I don't think i've tried to turn that mode off.. i'm so used to needing it on for the computer to recognize and connect to all my previous Android Devices.. thanks for the recommendation...

post-mortem said:
I'm curious if you're able to connect to a USB OTG storage device.
Click to expand...
Click to collapse
Couldn't find any OTG cable to try that but strangely enough a few days back I connected it to PC for charging and Nautilus popped up, same cable, same USB port and it started working all of sudden. Did verify with a couple of other cables and different ports and everything is working fine since.
"Charging connected device" notification never appeared again, only thing different (when it started working again) was that I was out of the air conditioned room most of those days, might it be moisture or something like that?
I'm back to my normal routine for a few days now and it's still 100% normal, will have to see if it stays that way.
Sorry for late response.

Here's an update in case someone else runs into this situation, I can say this with 99% certainty that is caused by the blackish residue build-up around the USB port over time. It's not too much that it's visible just by looking into the port but it's enough to make the device behave like this.
Here's what I did to get rid of it, took a match stick (don't use anything metal) and broke it in half making a sharp edge on both broken pieces, took the non coated piece and inserted sharp edge in the bottom side of the port and gently wiggled it around while applying some pressure towards the connector (just a little bit, make sure you don't break anything), did this for about 45 seconds then took out the match stick and the part that was touching the connector had turned blackish (I guess this is when you know you have 'cleaned' it enough?), repeated the same process on the top side of the port with a new match stick piece (guess you can use the same one after cleaning it with a tissue), the only difference was that this time applied the pressure in opposite side (other side of connector), device was on during all this time.
It builds up again after a while (~3 months) so I had to repeat the entire process again when it started doing that again at the start of December but it wasn't that annoying this time because I knew exactly what was wrong and how to get rid of it, device is still working fine 100%.
I'm simply sharing my experience and not encouraging anyone to do this but if you do decide to try this be sure not to use anything metal and don't break the connector inside the port (turning the device off would be a good idea too) and you'll be fine and if something does go wrong I won't be responsible.

Pixel 3 XL - USB Connections for File Transfer/Android Auto

Got my Pixel 3 XL yesterday and absolutely love it...
Just in case anyone else experiences issues I thought I would post this - did an online chat with Google and they think it might be a bug in the OS.
Connecting to my PC or Car, the device was showing the USB options when you swipe down for notifications permanently on Charging Only. Even changing this from that drop down had no effect. I could see the device on my PC but unable to view files/folders and unable to copy anything to the device. Similar symptoms in my car, the device would charge fine but no matter what I did it wouldn't connect to my Infotainment System.
To fix this I had to enable Developer Options, scroll down to Networking and there is a "Default USB configuration" setting. This was set to "No data transfer", I changed it to "File transfer" and rebooted and now everything works fine.
Hopefully this might help others :good:

Does your phone fast charge while using Android Auto?

I don't think so, how can I check that.
I've only had the device a couple of days now but have noticed that when I'm using it in the car running Google Maps and streaming music via AA it still seems to charge.
Doing the same on my original Pixel XL I would loose 1-2% over about 30-40 mins, not sure if that's just because the battery was starting to deteriorate.

Thanks, but for some reason that didn't work for me. Tried this with and without USB debugging and car is just not seeing the phone for AA, but charges it fine. Also tried 4 different cables just in case, if I plug in an S8+ to any one of those cables it works perfectly with the car.

[deleted, "wrong thread" mistake]