Database Users

USB issue

All of a sudden my pc is not recognizing phone as a usb drive.. It was working perfectly since day one with this phone but since yesterday it wont recognize it.. And even if it does, it takes a very long time. ive treid uninstalling the drivers and reinstalling, as well as turning debugging on and off. My pc is running windows 7 64bit.. I have also tried different roms and nothing.. When connected in debugging mode, it recognizes it immediately and installs drivers by i still cannot view my storage card.. Any help would be appreciatied.. Thanks

Install pdanet on your computer. When it gets to the part about driver installation, select samsung and voila.
Sent from my SPH-D700 using XDA App

Try another USB cable.

rufflez2010 said:
Install pdanet on your computer. When it gets to the part about driver installation, select samsung and voila.
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
Oops forgot to mention i did that as well.. still not working.. Maybe ill have to buy another usb cable..

jok3sta said:
Oops forgot to mention i did that as well.. still not working.. Maybe ill have to buy another usb cable..
Click to expand...
Click to collapse
:-\ sucks... hey, got to use the emoticons!!!! Ayways, yeah, sounds like the cable is dead. The one from my lg dare doesn= work for data tranfer, so I turned it into my car charger.
Sent from my SPH-D700 using XDA App

Firon said:
Try another USB cable.
Click to expand...
Click to collapse
Seconded. I bought a cheap charging kit and the cable would charge but would not allow file transfer. Took it back, bought another cable and it's fine.
Either the phone is finicky about cables, or it might just require a particular type (probably USB 2.0).

I had this issue also last week. I tried another cable and it worked fine.
But now I am having issues with my usb ports in general. Now they just stop working every once in a while and I am required to restart my laptop.
Don't know if the two problems are related.

Try different USB ports. Like the ones on the back on your computer.

I've been having the same issue. I went out to Radio Shack and bought a new data cable. So far all ports on my laptop, winXP pro 32bit, and my win7 64bit desktop have not had problems.
I'm thinking that the USB cable supplied by Samsung is crap. I tested them both out on the same machine, same port; the new one worked fine, while the stock cable only gave me adb access.

I had this same exact problem. I kept thinking the phone was going bad or something. I tried the cable that came with my Epic & the one that came with my Moment, both didn't work... for some reason it worked find on a Mac though. So when I gave my mom my Moment when I got the Epic she bought an extra micro-USB cable and I decided to try that one, for some odd reason, that one worked.
Still don't know exactly what was going on but a third-party cable fixed the problem for me.
Hope this helps.

No USB mount/debugging, only charging

I am trying to help my friend. I was going to root his Nexus S 4G for him (I have Nexus S myself and unlocked/rooted a long time ago). Well when I plug his phone in to the computer, nothing happens except for charging. No USB mount, no USB debugging notification, nothing. No response other than the phone starts charging.
Using another computer and another USB cable, I eliminated those as variables. The problem lies in his phone. Is there way anyone knows that I can help him fix this?

If your friend didn't install USB drivers the first time, it may not pop up again.
Sent from my Nexus S using XDA App

Does the phone show up in the Device Manager?

suksit said:
Does the phone show up in the Device Manager?
Click to expand...
Click to collapse
No, there is no indication the computer sees the phone at all. Tried with phone booted and with phone in bootloader mode.
I would assume his USB connection on the phone was faulty, but it does charge....

Try looking in Settings > About phone > Status
If Battery status says "Charging (AC)" instead of "Charging (USB)" then there might be a problem with the USB connection/cable.

I have a belkin USB cable that does this. I plug in the supplied one and the issue is gone
Sent from my Nexus S using XDA Premium App

trickyhenry said:
I have a belkin USB cable that does this. I plug in the supplied one and the issue is gone
Sent from my Nexus S using XDA Premium App
Click to expand...
Click to collapse
The cable is not the problem. Thanks though.
Sent from my LG-P509 using XDA App

Had the same issue.
New cable worked.

The same cable works with other phones!

Well I'd do a "Factory data reset" first. If that still doesn't help then there are 4 things I can think of right now:
Uninstall the USB driver in Windows and try to connect the phone again.
Try to plug the phone in an Ubuntu machine.
If wifi is working then I'll try to put the OTA package on the SD card, and flash that via stock recovery.
The last resort is to boot the phone in Download mode and use Odin to flash the stock ROM image.

[Q] USB device not recognized

I can't connect my phone to laptop it always shows it as unknown device .I have uninstalled it couple of in device manager and plugged it still same even its in USB debugging enabled .keep rebooting my laptop and keep trying still the same
Turn my off plug it to laptop them turn on still Its window 7. Tell me what to do ????? I think! It was rooted then I got OTA update (I was new I didn't know that I shouldn't install that I was happy to install on my rooted phone ) that's from where problem started I think.now I want to root my phone but it's not connecting .HELPPP

binsalamat said:
I can't connect my phone to laptop it always shows it as unknown device .I have uninstalled it couple of in device manager and plugged it still same even its in USB debugging enabled .keep rebooting my laptop and keep trying still the same
Turn my off plug it to laptop them turn on still Its window 7. Tell me what to do ????? I think! It was rooted then I got OTA update (I was new I didn't know that I shouldn't install that I was happy to install on my rooted phone ) that's from where problem started I think.now I want to root my phone but it's not connecting .HELPPP
Click to expand...
Click to collapse
Try reinstalling the drivers and/or use a different usb cable or different jack.

Believe me I have done all that different cable and PC reset my phone reset my PC .just because I have rooted my phone I can't send it for replacement and I can't unroot it without connect to PC and that is the problem .I'm here because this is my last hope .
Sent from my Nexus 4 using xda app-developers app

any updates on this?
i'm having the same problem. my n4 is not recognized - i've tried three different computers and i can't even get it to show up so i can move files in/out of the phone.
i bought this n4 used from kijiji. i just want to get it back to complete stock form with locked bootloader.
i've tried three different machines all windows 7 x64 - might try an xp machine but i think it's the phone
factory reset the phone
tried with and without usb debugging
tried 4 different cables
phone has unlocked bootloader
cannot get into recovery, i get an triangle with robot lying down
phone shows up as unrecognized usb device

binsalamat said:
Believe me I have done all that different cable and PC reset my phone reset my PC .just because I have rooted my phone I can't send it for replacement and I can't unroot it without connect to PC and that is the problem .I'm here because this is my last hope .
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
If you have an unlocked bootloader use this tool to lock it: https://play.google.com/store/apps/details?id=net.segv11.bootunlocker
To unroot use the permanent unroot feature in SuperSU.
Order is important since the Bootloader tool requires root.
Sent from my Nexus 4 using xda app-developers app

binsalamat said:
I can't connect my phone to laptop it always shows it as unknown device .I have uninstalled it couple of in device manager and plugged it still same even its in USB debugging enabled .keep rebooting my laptop and keep trying still the same
Turn my off plug it to laptop them turn on still Its window 7. Tell me what to do ????? I think! It was rooted then I got OTA update (I was new I didn't know that I shouldn't install that I was happy to install on my rooted phone ) that's from where problem started I think.now I want to root my phone but it's not connecting .HELPPP
Click to expand...
Click to collapse
SeraldoBabalu said:
any updates on this?
i'm having the same problem. my n4 is not recognized - i've tried three different computers and i can't even get it to show up so i can move files in/out of the phone.
i bought this n4 used from kijiji. i just want to get it back to complete stock form with locked bootloader.
i've tried three different machines all windows 7 x64 - might try an xp machine but i think it's the phone
factory reset the phone
tried with and without usb debugging
tried 4 different cables
phone has unlocked bootloader
cannot get into recovery, i get an triangle with robot lying down
phone shows up as unrecognized usb device
Click to expand...
Click to collapse
Try following these directions to properly install the Google drivers.
http://forum.xda-developers.com/showthread.php?t=1830108

Thanks for your response!
Do still have that problem ?
How did slove it?
Sent from my Nexus 4 using xda app-developers app

thanks. i installed the android sdk and java jdk but still have the problem. i believe the problem is with the phone 100%
my nexus always shows that it's charging on AC whenever plugged in. doesn't matter if it even is to AC or USB. the phone shows up as unrecognized device with a bang in the USB section of the device manager. on some computers it doesn't even show up.
i tried on my macbook pro and it doesn't even show up there but in every case, the phone charges.
wondering if there's a switch or toggle somewhere that will turn it on and get it working
i'm going to install a windows xp VM as a last ditch resort and see if it at least shows up there.

SeraldoBabalu said:
thanks. i installed the android sdk and java jdk but still have the problem. i believe the problem is with the phone 100%
my nexus always shows that it's charging on AC whenever plugged in. doesn't matter if it even is to AC or USB. the phone shows up as unrecognized device with a bang in the USB section of the device manager. on some computers it doesn't even show up.
i tried on my macbook pro and it doesn't even show up there but in every case, the phone charges.
wondering if there's a switch or toggle somewhere that will turn it on and get it working
i'm going to install a windows xp VM as a last ditch resort and see if it at least shows up there.
Click to expand...
Click to collapse
Make sure your device is on MTP and try an other data cable which has no missing/broken data wires inside.
Sent from my Nexus 4 using xda app-developers app

yep it tried on mtp and ptp with 4 different cables. two original nexus 4 cables, one nexus 7 cable and a blackberry cable. they all work with my other nexus 4... just not this one.
the windows VM didn't work unfortunately.

SeraldoBabalu said:
yep it tried on mtp and ptp with 4 different cables. two original nexus 4 cables, one nexus 7 cable and a blackberry cable. they all work with my other nexus 4... just not this one.
the windows VM didn't work unfortunately.
Click to expand...
Click to collapse
That is strange, it should work with the Windows Virtual Machine.
Maybe it is to do with the standalone machine using it in the same time.
Sent from my Nexus 4 using xda app-developers app

Same problem here. USB is not recognized using my Nexus 4 ( it used to be recognized on two PCs, but no longer), but another Nexus 4 connects perfectly. I can only charge a USB rate on chargers that used to charge at ac rate. I've tried everything, and more than mentioned in this thread.
LG-E960, Tapatalk b4

I've ordered a replacement USB port via Amazon for $23. Once I install it, I'll update this thread.
LG-E960, Tapatalk b4

Hi guys,
Seems that I've got the same trouble. Got my N4 (stock ROM, 4.2.2) a couple of weeks ago and everything was ok - connection as MTP, connection for debug and so on. But yesterday I connected it to my PC and found that the device indicates charging but not USB connexion. So I've tried to reboot PC and N4, tried other cables and 2 other PCs (my with Win8, and those with Win7 and Linux Mint if matters). Other devices are ok (Huawei Honor, N7, Milestone2).
The phone just doesn't detect USB connection - in both MTP and PTP. Then I tried to plug in wall charger and connect back again to USB. AND IT WORKED! The phone detected the connection so I was able to mount it and detect with adb. I thought that the problem was solved but when I connected it next time - same ****. This time nothing helps (most likely that there wasn't any casual relationship between wall charger connection and temporary fix...)
What options I've got now? Try to root the device and look into syslog to detect if it's a software issue or disassemble the device and try to find any defects on USB port?
Thank you,
Alex

allookin said:
Hi guys,
Seems that I've got the same trouble. Got my N4 (stock ROM, 4.2.2) a couple of weeks ago and everything was ok - connection as MTP, connection for debug and so on. But yesterday I connected it to my PC and found that the device indicates charging but not USB connexion. So I've tried to reboot PC and N4, tried other cables and 2 other PCs (my with Win8, and those with Win7 and Linux Mint if matters). Other devices are ok (Huawei Honor, N7, Milestone2).
The phone just doesn't detect USB connection - in both MTP and PTP. Then I tried to plug in wall charger and connect back again to USB. AND IT WORKED! The phone detected the connection so I was able to mount it and detect with adb. I thought that the problem was solved but when I connected it next time - same ****. This time nothing helps (most likely that there wasn't any casual relationship between wall charger connection and temporary fix...)
What options I've got now? Try to root the device and look into syslog to detect if it's a software issue or disassemble the device and try to find any defects on USB port?
Thank you,
Alex
Click to expand...
Click to collapse
I got mine to work by using a 2 into 1 usb plug. The kind that comes with portable CD writers. Once I got it working I reflashed stock 422 and the problem is gone. Turns out it was a bad flash from the previous owner.
Sent from my Nexus 4 using Tapatalk 2

SeraldoBabalu said:
I got mine to work by using a 2 into 1 usb plug. The kind that comes with portable CD writers. Once I got it working I reflashed stock 422 and the problem is gone. Turns out it was a bad flash from the previous owner.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
Thanks for advice. During this day it worked properly twice - the phone just started detecting connection. No obvious reasons for that... I got a new device with stock 422 from amazon and haven't flashed or event rooted it. How do you think, should I try to flash it with official 4.2.2? Now I can say that it's most likely a software issue.

allookin said:
Thanks for advice. During this day it worked properly twice - the phone just started detecting connection. No obvious reasons for that... I got a new device with stock 422 from amazon and haven't flashed or event rooted it. How do you think, should I try to flash it with official 4.2.2? Now I can say that it's most likely a software issue.
Click to expand...
Click to collapse
I'd say try a factory reset first and see how that works.
Sent from my Nexus 4 using Tapatalk 2

SeraldoBabalu said:
I'd say try a factory reset first and see how that works.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
Tried it out - the result is the same. Now I can not even unlock the bootloader to reflash 422... Btw I didn't managed to find a 2into1 cable but checked if the same trick would work with USB hub with external power - it works really better. The device can detect the connection almost all the times and I can see it listed in adb devices and as a mounted storage. Though in fastboot mode this doesn't help. Device remains unrecognized.

allookin said:
Tried it out - the result is the same. Now I can not even unlock the bootloader to reflash 422... Btw I didn't managed to find a 2into1 cable but checked if the same trick would work with USB hub with external power - it works really better. The device can detect the connection almost all the times and I can see it listed in adb devices and as a mounted storage. Though in fastboot mode this doesn't help. Device remains unrecognized.
Click to expand...
Click to collapse
well if you're getting a connection to the computer but not in fastboot, your drivers might just need removal/reinstallation.
once you get it going, reflash the stock 4.2.2 from google and see how it goes.
if that doesn't work and you can get it going, get it replaced by Google.
if you can, try it on a mac.. they don't need the drivers installed. just run it all from terminal.

Okay, I've managed to track down the issue...
Once I got it available for fastboot I've unlocked bootloader and then flashed with Cyanogen. The problem remained but I could get dmesg output for plug-in event. I've managed to get logs for problematic case (doesn't detect USB data connexion) and for correct behavior case (when Android detects USB data connection).
No sense to put the whole log pieces here just a brief quotes.
For correct case:
Code:
Avail curr from USB = 500
For incorrect case:
Code:
Avail curr from USB = 1500
USB module firmware tells the system that it has detected data-connection and enabled low-power mode (500mA). In this case Android initiates mtp and adb:
Code:
<6>[62539.001178] adb_open
<6>[62539.001269] mtp_bind_config
<6>[62539.001422] adb_bind_config
And in problematic case USB module firmware incorrectly indicates for the OS that there are only power-connection (5V/ground). I cant say exactly where the issue is but there are only two options - bug in USB module firmware or physical fault of connection (pins, bus or whatever else). Anyway I've to replace USB module or just go with it and use adb over network (the matter is that sending the device back to Amazon seller from my country would cost me 1/3 of the purchase total so I consider that just unreasonable).
Thanks to LG - for my money I got not only a box with device but also whole lotta fun =)

USB keeps reconnecting

Hello,
I'm having a problem with the S4.
When I plug it into the computer (Running Windows 8), the device starts charging and I can sync files with the device.
But, after 15 minutes it starts reconnecting, the USB connection just keeps disconnecting and connecting over and over again, nonestop.
But the device is still charging, only the connection to the computer stops.
Does someone know what the problem might be?

+1
Sent from my GT-I9505

exoduser2012 said:
Hello,
I'm having a problem with the S4.
When I plug it into the computer (Running Windows 8), the device starts charging and I can sync files with the device.
But, after 15 minutes it starts reconnecting, the USB connection just keeps disconnecting and connecting over and over again, nonestop.
But the device is still charging, only the connection to the computer stops.
Does someone know what the problem might be?
Click to expand...
Click to collapse
Try reinstalling Samsung drivers, try different USB cable and try different USB ports. Is it Kies that you use for syncing, or a different application? Make sure it is up to date, uninstall and then reinstall it. Can't think of anything else.
Sent from my GT-I9505 using xda app-developers app

themadba said:
Try reinstalling Samsung drivers, try different USB cable and try different USB ports. Is it Kies that you use for syncing, or a different application? Make sure it is up to date, uninstall and then reinstall it. Can't think of anything else.
Sent from my GT-I9505 using xda app-developers app
Click to expand...
Click to collapse
Hello,
Thanks for commeting.
I already tried reinstalling the drivers (I reinstalled Kies).
And the problem occurs not only when I use it.
It suddenly starts reconnecting, without me even touching it for the last 15 minutes.
What should I do?

try in the rear usb ports, or change the cable, if no good luck try cleaning the port of the device..

carlosm15 said:
try in the rear usb ports, or change the cable, if no good luck try cleaning the port of the device..
Click to expand...
Click to collapse
Already tried the rear USB ports and changed the cable.

exoduser2012 said:
Already tried the rear USB ports and changed the cable.
Click to expand...
Click to collapse
I'm facing the same problem with my Galaxy Nexus running CM 10.1
Did anyone figure out the problem yet?
---------- Post added at 04:28 PM ---------- Previous post was at 03:41 PM ----------
My problem seems to be resolved now after updating Samsung KIES to latest version which automatically updated phone drivers.

this happent to me only at 100% charge, all rom's

same problem
criszz said:
this happent to me only at 100% charge, all rom's
Click to expand...
Click to collapse
Same problem.plz help some1.i re installed windows bt no change it constantly disconnected and reconnecting.

[Q] Phone charges but computer doesn't recognize as device.

Ive been trying to figure out whats wrong with my phone or computer. My Phone charges but computer doesn't recognize as device. I already tried a different cable, I've tried going to my phone's settings => storage =>USB computer connection => and checked the (MTP) Media Device. I've gone through posts there and still no luck, anyone know what it might be?

You don't have the usb drivers setup on your pc. Google 15 second adb drivers xda and try that
Sent from my Nexus 5 using XDA Free mobile app

Deleted.

Blue.F150 said:
Ive been trying to figure out whats wrong with my phone or computer. My Phone charges but computer doesn't recognize as device. I already tried a different cable, I've tried going to my phone's settings => storage =>USB computer connection => and checked the (MTP) Media Device. I've gone through posts there and still no luck, anyone know what it might be?
Click to expand...
Click to collapse
Try plug usb in back side of the computer cpu or try in different usb data cable or connect usb to different usb port or plug usb to computer shake usb left and right becarefull ( very slowly ) (i am responsible for any damage do it your self )
If it work dont say thanks pls press thanks button for my small effort :thumbup:
Sent from my GT-S5360 using xda premium

john morrision said:
Try plug usb in back side of the computer cpu or try in different usb data cable or connect usb to different usb port or plug usb to computer shake usb left and right becarefull ( very slowly ) (i am responsible for any damage do it your self )
If it work dont say thanks pls press thanks button for my small effort :thumbup:
Sent from my GT-S5360 using xda premium
Click to expand...
Click to collapse
Thanks for those who helped but I found out that it was the OS itself. It had a virus before and ever since it stopped working , I reinstalled the OS and now it works. Anyways thanks!