Database Users

"usb device not recognized" with two diff. win7 installations.

as title states.
It doesn't seem to be the samsung drivers
as I have uninstalled and reinstalled.
but the Android drivers. I have no Android drivers installed anymore
(the 3 of 4 that installs)
therefore i lose adb connectivity
*This has happened on 2 different Windows 7 installations. (switching between 2 different hdds, on this laptop)
I have usb debug on ofcourse.
I have uninstalled reinstalled latest samsung drivers.
I have installed pdanet drivers.
I have turned off phone, while connected then boot up. still no fix.
I am using acs froyo dk17. But this happened with dk05 as well.
Is there a fix for this?

I've had this problem twice. The way I fixed it was to wipe the sd card. Its a pain but that's what fixed it
Sent from my SPH-D700 using XDA App

If not a driver problem (doesn't sound like it is) the next *usual* suspect would be the usb cable. The samsung cable that shipped with these phones is crap. I got a 6' belkin one on amazon for $8 that has worked flawlessly.

Make sure you're not using a USB port that's on a hub or daughtercard. It should be one that's directly on the motherboard.

I kept fiddling with settings and rebooting both phone and computer and got past this once on my old win7 box. On my new one, I got nowhere after an hour or so. Worked first thing with the same cable on my win xp machine.
Plug your phone into a USB1 only hub, or on the same channel as a usb 1 keyboard or mouse and it will detect just fine... it won't really be useful because it won't be able to flash still (I believe it should detect as a composite device with several facets and only some of those are usb1-only compatible). I believe that the underlying problem is a bad implementation of the usb spec on one of the usb2 only parts, but I didn't feel like digging any deeper. I might try a win xp vm on the same physical hw to see if I can narrow it down to a win7 usb2 + device usb2 compatibility issue. Might be worth making sure our win7 patches are up to date, too.
Sent from my SPH-D700 using XDA App

Thanks for the replies guys.
The usb trick won't work because it's a laptop. And I tried all four of them. I only have windows 7 machines. One being a ultra sff and has like 12 usb ports. It hasn't failed me yet, but happens on the laptop.
It wouldn't hurt to get another cable, a longer one. And my sd is maxed out, I will pull it instead of format.
Thanks all
Sent from my SPH-D700 using Tapatalk

I had this problem. Plugged into the back instead if the hub and reinstalled everything. Now it's working like a charm on all usb ports. Really odd problem.
Sent from my SPH-D700 using XDA App

I had this problem. I was using a USB extension cable that was a bit long. All the other phones and USB devices worked fine with it. EPIC did not want to. I got the impression that EPIC needs more power from the USB port than most of these other devices. For me, skipping the USB extension cable did the trick. I also used a powered USB hub and that worked well too. You might want to try different USB ports. Some may provide more power than others. Also try a powered USB hub (some are built into monitors) if you have access to one.

I had the same issue with my laptop as well. It is most likely the cable. The samsung one is crap. I tried every port and installed the usb drivers a dozen times with no success. Used the cable from my wifes blackberry and worked on the first try. Just pick up a new cable. Try monoprice.com they have awesome deals.
Sent from my SPH-D700 using XDA App

I just had this problem, I switched my cable and then it worked fine.

hayabusa1300cc said:
as title states.
It doesn't seem to be the samsung drivers
as I have uninstalled and reinstalled.
but the Android drivers. I have no Android drivers installed anymore
(the 3 of 4 that installs)
therefore i lose adb connectivity
*This has happened on 2 different Windows 7 installations. (switching between 2 different hdds, on this laptop)
I have usb debug on ofcourse.
I have uninstalled reinstalled latest samsung drivers.
I have installed pdanet drivers.
I have turned off phone, while connected then boot up. still no fix.
I am using acs froyo dk17. But this happened with dk05 as well.
Is there a fix for this?
Click to expand...
Click to collapse
Also make sure your antivirus is off although that's likely not the culprit. Do you install the drivers as administrator?
Try a new cord. If that doesn't work, try deleting/uninstalling the device and/or hub from the device manager - plug the phone in, letting win7 do its worst by not recognizing it, then open the device manager and find the usb hub. try deleting/uninstalling. unplug the phone and scan for hardware changes. I think this may force windows to reinstall the drivers for the usb hub. Disclaimer, it's been a while since I spent significant time fooling with windows computers so take this advice at your own risk - I'm feeling my way like an old man with cataracts trying to find his way around his long-lost childhood home. in the dark. With unfamiliar furniture. In an earthquake. While in a wheelchair. With flat tires....
My computer did this for a while and now it doesn't although it's certainly possible I changed the cord I was using.

The best way to get drivers to work is install PDAnet IMO..
I had driver problems upon driver problems.. swapped cables, etc.
went through all the motions that you all are describing here and what fixed it for me was installing PDAnet. Worked like a charm.
Hope this helps.

I agree about using pdanet for drivers. Unfortunately this problem isn't with the driver not being installed correctly. I got it on one machine and not another, using the same friver. In fact I got it to work on the same machinewith the same driver ... just different ports (one was stuck in usb1/ohci nd worked, the usb2 port never worked on one machine and a usb1 port never worked on a different one).
Sent from my SPH-D700 using XDA App

warlar12 said:
I just had this problem, I switched my cable and then it worked fine.
Click to expand...
Click to collapse
This worked for me when I had the problem. This will be the second time I had a usb cable go bad on me. Maybe I shouldn't buy those cheap ones from China...

I've had this problem with numerous cables on Dell E series laptops with 3 Epics and a Moment. For the life of me I couldn't get the phone to be recognized when using the USB ports on the left side of the machine. Plugged it into the ones on the right and have never had a problem. I think with the Dells it's a low current issue on the left side ports. The shorter the USB cable the better off you'll be if it is a low current problem.

thanks but i did alot of that last night and today, uninstall/reinstall drivers, usb hubs.. nothing
i may need to try another cable because i am workign on a friends epic sunday.
bilestoad said:
Also make sure your antivirus is off although that's likely not the culprit. Do you install the drivers as administrator?
Try a new cord. If that doesn't work, try deleting/uninstalling the device and/or hub from the device manager - plug the phone in, letting win7 do its worst by not recognizing it, then open the device manager and find the usb hub. try deleting/uninstalling. unplug the phone and scan for hardware changes. I think this may force windows to reinstall the drivers for the usb hub. Disclaimer, it's been a while since I spent significant time fooling with windows computers so take this advice at your own risk - I'm feeling my way like an old man with cataracts trying to find his way around his long-lost childhood home. in the dark. With unfamiliar furniture. In an earthquake. While in a wheelchair. With flat tires....
My computer did this for a while and now it doesn't although it's certainly possible I changed the cord I was using.
Click to expand...
Click to collapse

It HAS to be the power differences NOT cable.
Same cable as I charge with, plugged into the front of the computer (hub).
Plugged into the back of the computer recignized the first time.
=USB power

In my case, tried several micro USB cables, no dice. Tried my laptop and desktop, no dice. Tried USB hub or direct to PC usb ports, no dice. Device manager shows the right comm port but all the one-click roots i've tried can't find the phone. USB storage has never mounted for me from day one either.
Sigh, never had this issue with any other Android phone.

Finally figured out my issue. I had set it to "modem" while doing something else in an epst menu rather than "pda". Since I corrected that, works dandy.
I feel so stupid.
Forgive My Brevity. To Be Or Not To Be...

Would using my friends droid x cable work with the Samsung epic?
Sent from my SPH-D700 using XDA App

Nexus 7 Not Showing Up In Device Manager

Let me start by stating that I have read through pages of various threads on here & haven't found an answer... Or at least I haven't found an answer in laymen's terms that I can understand. So, if/when offering help, please break it down for me a little. Thank you!!
I just purchased a Nexus 7. When I plug it in to my Windows 7 PC, nothing happens. It doesn't install any device drivers. It doesn't appear anywhere in my device manager. Nothing. After reading several posts, I downloaded drivers from Asus's site, but now I don't know how to install them. I came across this comment from "MrTrackZed" in another thread (one I can't yet post in):
"After you download the driver, unzip/extract its contents. Then you go to your device manager on your PC, and plug in your Nexus. You'll see it with a yellow exclamation point, right click it and select update driver. You can then select this driver manually. Also, if using Wug's root method, make sure you configure the fastboot driver as well. I don't have my PC with me, but I believe its step 6 in the driver install process. Its all very easy, sounds confusing, but its not. Good luck! "
I totally understand that, but what do I do if the device isn't even showing up in the device manager? I've plugged it in to 3 different computers (2 windows 7 & one Windows XP) and it does nothing on any of them. The device does show that it's charging, but nothing else. Please help. This is driving me nuts. Oh, and I've done all of this while having debugging on & off. Same results.
~Clint

U may just have a bad device! I have seen posts similar to this and after a device exchange they have no problems.
The fact that It doesn't register on three different computers means that or a bad cable.
Sent from my Nexus 7 using Tapatalk 2

When you plugin your phone, on your phone, you need to click USB Storage, did you do that?
Another thing to try is to enable Debuging on your phone, and install drivers, to check if device manager can detect it.
We have a package contains the right drivers for your device, you may want to download and try it. We have Nexus 7 users works fine.
http://www.vmlite.com/vaac/
This is for our vmlite vnc server, but it may help you, as it installs USB drivers.

huisinro said:
When you plugin your phone, on your phone, you need to click USB Storage, did you do that?
Another thing to try is to enable Debuging on your phone, and install drivers, to check if device manager can detect it.
We have a package contains the right drivers for your device, you may want to download and try it. We have Nexus 7 users works fine.
This is for our vmlite vnc server, but it may help you, as it installs USB drivers.
Click to expand...
Click to collapse
I did as you suggested & installed both the PC client & downloaded the app from google play. Still nothing... The device works perfectly except for this one issue. It's making me crazy!

can you run this command to debug? (open a command window on Windows)
"c:\program files\vmlite\AndroidAppController\adb.exe" devices
what is the output message?

It just occured to me that some USB cable is charging only, this morning, I got such a cable, there is no USB device showing up in device manager with that USB cable, once I switched to another data cable, it works.
You may want to change to another usb cable to test.

Problem Identified
Okay, so after much research, I think the problem has been identified. The one thing that I've found in common with all the threads that discuss this problem is that we've all, at one point or another, used a USB car charger to charge our N7. I've found that most cheap USB chargers only put out at about 1 amp. The N7 is trying to pull 2 amps. This is causing the USB cable to overheat & damage the USB connector on the N7. Unfortunately, once the damage is done, it's done. Fortunately for me, I purchased my N7 at a local retailer that had a 30 day return policy & they gave me a new N7. It works great & I've ordered a 2.1 amp USB car charger to prevent this from happening in the future.

huisinro said:
It just occured to me that some USB cable is charging only, this morning, I got such a cable, there is no USB device showing up in device manager with that USB cable, once I switched to another data cable, it works.
You may want to change to another usb cable to test.
Click to expand...
Click to collapse
Thank you for the reply, but I am using the OEM N7 USB cable. Plus, I used 3 other cables to no avail. See my previous comment though. I've identified the error.

Sorry for the bump, but are you saying that (under)charging at 1A essentially breaks the N7? Wow. You'd think it would break if you'd feed it 5A or so, not at less than 2!
I think I'm having the same issue now. I can charge, but no debugging for me since my computer doesn't even notice a USB device. Must have happened in my car once when I was trying to charge my phone and my N7 at the same time. (Since then I can't charge any phone at all in the car using that charger.) Let's see if I can find the warranty slip.

[Q] Nexus 7 wont connect to usb, charge when on, but usb-otg works

Im aware that one or two other threads have been created with this same general question but one thing they didnt ask is what to do if you cant fix it?
As the thread topic states my Nexus 7 will not connect to my PC via USB (It is not seen at all, its not a driver issue I've tried). It will not charge when turned on but it was charging when turned off last night. When I checked this morning it said I had a full battery but after turning the tablet on it said I only had 60% battery. All the started happening after I charged it with a battery pack at work the other day because I forgot my charger at home (some people have had similar problems after using car chargers). It will let me connect a flash drive to it via USB-OTG. I have tried 3 different cables on 2 different PCs (One running Windows 7 and the other running Windows 8). I really dont know where to go for help anymore as Ive spent the past 2-3 days googling like a mad man trying to find an answer and noone seems to have one.
I would love for someone to really help me out and get some steps that could fix this, however, if its not fixable how do I RMA it? I cant lock the bootloader and I cant flash a factory image.

You say it is not a driver issue, but your symptoms indicate it is. I would start over with the removal and re-installation of the proper drivers.

Groid said:
You say it is not a driver issue, but your symptoms indicate it is. I would start over with the removal and re-installation of the proper drivers.
Click to expand...
Click to collapse
I've uninstalled them. Every time I go to manually install them the guides always say to find where the nexus is and my nexus never shows up. If it was drivers it would still charge when its on. So how can drivers cause the tablet not to charge from the ac adapter?

Try Wugfresh's program. I had issues w/o it.
Sent from my SCH-I535 using Tapatalk 2

dennyjones said:
Try Wugfresh's program. I had issues w/o it.
Sent from my SCH-I535 using Tapatalk 2
Click to expand...
Click to collapse
Thats the toolkit I have installed. Its also the "guide" I am following when it comes to drivers. I tried to see if I could make the nexus connect to the pc while in fastboot and nothing happened then either. Everything he says to do involves the PC actually seeing the nexus :/
Ive changed it from mtp to ptp, toggled debugging, went to different back ups, flashed a new rom, etc etc. I really feel like Ive tried just about everything. Someone mentioned in one thread about some specific code in the nexus being wrong and possibly changing it could fix it but I do not know how I would go about doing that.

I also originally used the Wugfresh toolkit and had problems getting the drivers installed properly on Win7-64. Ultimately, I think I installed pda.net on my computer and on the N7 and was able to connect after that. Haven't had a problem connecting since. Re-read some of the Wugfresh posts about driver problems. You should be able to get it sorted out.

Groid said:
I also originally used the Wugfresh toolkit and had problems getting the drivers installed properly on Win7-64. Ultimately, I think I installed pda.net on my computer and on the N7 and was able to connect after that. Haven't had a problem connecting since. Re-read some of the Wugfresh posts about driver problems. You should be able to get it sorted out.
Click to expand...
Click to collapse
I sent you a PM but I really dont think this is an issue with drivers. I have been able to connect the N7 to my PC perfectly before the other day. Never a problem at all. Now I have uninstalled/reinstalled the drivers as best as I could (currently I have the samsung drivers because they are the only ones that will install without having to verify that the phone is connected via ADB and I had them left over from my Fiance's GNex so they have been here all along when the N7 was actually connecting).
The N7 is not connecting to the PC at all. It does not show up in device manager. You cannot make an ADB connection to it. It has already been rooted and it is running the latest version of Paranoid Android. On top of that the AC adapters will not charge the N7 while it is turned on. Its like the N7 turns away any usb connection other than a USB-OTG cable while it is on.
Also I really do appreciate the help. This has just been really frustrating for me.

Hello,
Since yesterday, I have exactly same issue with my Nexus 7 3g.
Everything is working perfectly but computer doesn't see Nexus at all (nothig works Bootloader, ADB, MTP,PTP).
Charging is fine (looks like), USB HDDs, pendrives are working as before.
Reinstaling drivers, changing to PTP, switchin on/off USB debugging didn't help.
Checked : other Nexus connects to the computer without problems, so its not drivers issue.
I assume it happened after Nexus was connected to my car charger.
Does anybody have solution/fix for that ?
Unfortunately my Nexus comes from USA, can I RMA it in Europe ?

I feel badly for everyone having these issues. I feel very lucky I'm not having them. It sounds as if the microusb port may have been altered/damaged by certain kinds of connections, like the battery pack or car charger. I don't know why this would happen and my own car charger (Moto oem for my Bionic) has worked fine on the N7. I did pick up the usb cable attached to my pc one day and created a static shock to the connector. Since then, that bank of 4 usb ports will not show either my N7 or bionic, but my usb mouse, keyboard, and printer work with them. The other bank still works, as does the pci port expansion card and my front ports. If I do have a glitch with the pc connection, I restart both the computer and the N7 and then it works. Sorry I don't have a solution.

I also assumed a damaged/fried USB post on the Nexus 7. There are 2 data lines and 2 power lines in the charging socket I think. If the power lines are damaged, usb otg may still be working. Its also tying in with the use of a power pack.

davidoff59 said:
I also assumed a damaged/fried USB post on the Nexus 7. There are 2 data lines and 2 power lines in the charging socket I think. If the power lines are damaged, usb otg may still be working. Its also tying in with the use of a power pack.
Click to expand...
Click to collapse
Have you tried switching between MTP and PTP and seeing if that works? If I used the PTP setting for the USB it shows up, I can then move files onto the PICTURE folder and once there move to another folder while using the Nexus.
-AkWingnut

Wow or strange should be more of the reply. I have done this before but it never worked. Thanks for the help. For anyone else needing help here is what I did. First opened the Nexus Tool Kit, then Full Driver Installation Guide, launched USBDeview, then - In particular look for devices with Vendor ID - "18d1" or... "04e8" - Simply right click these devices, and select the option to: - "Uninstall Selected Devices", final step unplugged the device and plugged it back in and it worked. Also MTP enabled USB Debug unchecked. Thanks again...
-AkWingnut

Tried this and haven't had any luck so far. I'm going to try pdanet or samsung drivers again later today and post results.
Sent from my Nexus 7 using xda app-developers app

Have exactly the same trouble. I'm with you guys. USB host works, no reaction in device manager. Did your nexus was unlocked? Rooted?

xxut said:
Have exactly the same trouble. I'm with you guys. USB host works, no reaction in device manager. Did your nexus was unlocked? Rooted?
Click to expand...
Click to collapse
Bump!
I'm experiencing similar issues with my Nexus 5. This is the only thead I can find that has a similar problem. My Nexus 5 worked on SlimKat, I flashed stock L Preview, now my device won't charge when it is powered into the OS. Bootloader works fine and charges when turned off. I upgraded to 5.0 which came out today (Yay!) and the problem persists.
Have any of you lads or ladies had any updates?

nintennuendo said:
Bump!
I'm experiencing similar issues with my Nexus 5. This is the only thead I can find that has a similar problem. My Nexus 5 worked on SlimKat, I flashed stock L Preview, now my device won't charge when it is powered into the OS. Bootloader works fine and charges when turned off. I upgraded to 5.0 which came out today (Yay!) and the problem persists.
Have any of you lads or ladies had any updates?
Click to expand...
Click to collapse
In my case it was a hardware trouble. Fixed by motherboard replacing in official service centre.

[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
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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
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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.
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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 =)

Nexus 6p not detected by PC

I'm pretty stumped with this one so I'm throwing it out there to see if you lot have any ideas.
I have a Nexus 6p that can charge, however it is not recognized whatsoever by the computer. No notification sound when I plug it in (it just starts charging).
When in bootloader it says "connect usb data cable", and there are no adb devices found.
I tried reinstalling drivers a bunch of times to no avail, and tried on another computer.
Fairly confident, I ordered a new USB board. I've now swapped it out, and plugged it back in to the computer, and low and behold the issue is still the same.
I'm guessing there is something wrong on the motherboard. Any ideas? Did I miss something obvious?
EDIT: I've tried multiple cables, and usb ports. ADB works fine with my nexus 5x.

what OS are you running on your computer?
what version of android?
when you plug it in, do you get any options to choose from on the notification shade? (is USB debugging turned on in developer options?)

I am having the exact same issue. I am trying to back everything up before installing Nougat but I cant get the phone to be recognized by the PC. I get the pop up in the notification bar and can select from charging, MTP, PTP, etc, but I can not see anything on the computer. Absolutely nothing shows up in device manager.
I have tried reinstalling drivers and going through all steps on Wug's toolkit but nothing works. I can however connect to my wife's laptop with no issue, so it is not the phone. I installed all drivers and used my PC to root originally, so there has to be something that happened since February. Both PCs are running windows 10 and I tried my phone on both Pure Nexus 6.0.1 and an old stock 6.0.0 backup and have the exact same issue.
I have Googled around and cant really find any answers. I am pretty sure it is something in Windows that can likely be fixed with a reinstall, but that is something I really dont want/have time to do because I have a ton of programs and games setup on 3 seperate drives that would take quite a while to reinstall. I am really hoping someone has been able to solve this problem in the past.
Good luck. I will be steadily trying to get mine to work and I will post back if I make any progress at all. I will also be watching this thread to see if anyone has suggestions.

I just got mine working. What I ended up having to do was update the firmware for my Asmedia USB 3.1 controller. I did that and plugged my phone in and it worked perfectly. Look on your motherboard/PC manufacturer's website and see if there is any firmware or drivers that pertain to USB that can be updated. Good luck, I really hope you figure it out because I know it annoyed the hell out of me.

Clay333 said:
I just got mine working. What I ended up having to do was update the firmware for my Asmedia USB 3.1 controller. I did that and plugged my phone in and it worked perfectly. Look on your motherboard/PC manufacturer's website and see if there is any firmware or drivers that pertain to USB that can be updated. Good luck, I really hope you figure it out because I know it annoyed the hell out of me.
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Click to collapse
I'll try that later today when I get back from work. Thanks

spunks3 said:
what OS are you running on your computer?
what version of android?
when you plug it in, do you get any options to choose from on the notification shade? (is USB debugging turned on in developer options?)
Click to expand...
Click to collapse
Windows 10 LTSB
Android 6.something was on it. But I did a bad flash on both system AND recovery, so I need to flash over ADB.
There are no options since I cannot access android.

kiamo said:
Windows 10 LTSB
Android 6.something was on it. But I did a bad flash on both system AND recovery, so I need to flash over ADB.
There are no options since I cannot access android.
Click to expand...
Click to collapse
So it sounds like a driver issue. Have you tried reinstalling drivers? maybe try something like Wug's toolkit.

spunks3 said:
So it sounds like a driver issue. Have you tried reinstalling drivers? maybe try something like Wug's toolkit.
Click to expand...
Click to collapse
Pretty sure drivers are fine. I can ADB into other phones no problem. I have also tried on another computer and the issue is the same.

I have the exact same issue as OP. Everyone keeps saying it's a Windows driver issue, but how can it be when Windows doesn't even detect a USB device being plugged in?
---------- Post added at 12:05 PM ---------- Previous post was at 11:49 AM ----------
I noticed something and wanted to see if you have the same issue. In the Battery settings menu, when you plug your phone into the USB port, does it say Charging over USB and then switch to Charging on AC 5 seconds later? My Nexus 4 always stays as Charging over USB so I think there is something to this.

Are you connecting via USB-C to USB A (USB 2.0)? Some older computers cannot handle it without a proper driver update. Try using a USB-C to micro USB adapter
Sent from my Nexus 6P using XDA-Developers mobile app

tmar89 said:
I have the exact same issue as OP. Everyone keeps saying it's a Windows driver issue, but how can it be when Windows doesn't even detect a USB device being plugged in?
---------- Post added at 12:05 PM ---------- Previous post was at 11:49 AM ----------
I noticed something and wanted to see if you have the same issue. In the Battery settings menu, when you plug your phone into the USB port, does it say Charging over USB and then switch to Charging on AC 5 seconds later? My Nexus 4 always stays as Charging over USB so I think there is something to this.
Click to expand...
Click to collapse
I can understand why people will be quick to suggest that given that 9/10 cases are this issue. However as I already stated, I've tried multiple cables, ports, drivers, computers, phones. And other phones work fine, just not this 1 device. So as far as I'm concerned, there is almost certainly nothing wrong on the computer side.

bb709394 said:
Are you connecting via USB-C to USB A (USB 2.0)? Some older computers cannot handle it without a proper driver update. Try using a USB-C to micro USB adapter
Sent from my Nexus 6P using XDA-Developers mobile app
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Click to collapse
I've tried my motherboards USB2.0, 3.0, and USB C port.
I primarily use my USBC->USBC cable without the need for any adapters. It works fine with my Nexus 5x. When I plug in my 6p, it starts charging, however windows does not even recognize anything has been connected.

kiamo said:
I've tried my motherboards USB2.0, 3.0, and USB C port.
I primarily use my USBC->USBC cable without the need for any adapters. It works fine with my Nexus 5x. When I plug in my 6p, it starts charging, however windows does not even recognize anything has been connected.
Click to expand...
Click to collapse
Can you go into Settings - Battery and then plug in your USB cable. Does it say Charging over USB and does it switch to Charging on AC?

tmar89 said:
Can you go into Settings - Battery and then plug in your USB cable. Does it say Charging over USB and does it switch to Charging on AC?
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Click to collapse
I don't have a working system boot atm, or a working recovery partition. I need to flash both. This is in no way connected to the major issue. The issue was around for a long while before I did a bad flash. Now I need to connect via bootloader to reflash recovery and install a working system; so I'm forced to address this problem now.

kiamo said:
I don't have a working system boot atm, or a working recovery partition. I need to flash both. This is in no way connected to the major issue. The issue was around for a long while before I did a bad flash. Now I need to connect via bootloader to reflash recovery and install a working system; so I'm forced to address this problem now.
Click to expand...
Click to collapse
Good luck. I'm at the point where I need to send my device to Huawei. I hope the warranty can cover this bad USB issue.

Huawei wanted to charge me almost $300usd because I unlocked my bootloader.

kiamo said:
Huawei wanted to charge me almost $300usd because I unlocked my bootloader.
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Click to collapse
Oh wow. Mine came with an unlocked bootloader. They didn't say anything about charging me $300. Geez, I hope this isn't the case.

tmar89 said:
Oh wow. Mine came with an unlocked bootloader. They didn't say anything about charging me $300. Geez, I hope this isn't the case.
Click to expand...
Click to collapse
Normally when you unlock your bootloader you void your warranty. It's the price we pay for custom romming etc.
Did you by any chance buy a second hand device? I've never heard of phones coming unlocked by default.

kiamo said:
Normally when you unlock your bootloader you void your warranty. It's the price we pay for custom romming etc.
Did you by any chance buy a second hand device? I've never heard of phones coming unlocked by default.
Click to expand...
Click to collapse
I bought it used-like new on Amazon (https://www.amazon.com/Huawei-Nexus-6P-unlocked-smartphone/dp/B015YCRYZM). Says it has a US Warranty.

tmar89 said:
I bought it used-like new on Amazon (https://www.amazon.com/Huawei-Nexus-6P-unlocked-smartphone/dp/B015YCRYZM). Says it has a US Warranty.
Click to expand...
Click to collapse
:S good luck. If it's any consolation my warranty region is HK not USA. You might be ok.