Related
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
I have tried just about everything to get my Xoom to work with my 64bit Windows 7 system, but the various steps do not work. What is even more odd is that I have a laptop with windows 7 64bit enterprise that works perfectly with the Xoom.
So here are the symptoms:
1) When I connect the Xoom without debugging on, it tries to install a driver, but fails with a message about MTP drive failure.
2) When I turn debugging on, it installs a driver and tells me that the Xoom installed, but then my computer goes wonky. I can't open "My Computer", it like Windows Explorer freezes up. As soon as I disconnect the Xoom, my desktop works correctly again and I can go into "My Computer".
A few times i've gotten into "My Computer" after the Xoom installed, but when I double click on the Xoom icon it just times out.
The only difference I can think of between this PC and my laptop is that in the past I've connected my Droid X to this PC, and used those drivers. I'm not sure if it is some sort of issue because of the X or what. I've installed, uninstalled, cleaned, restarted, etc... with the Motorola drivers.
Its driving me nuts. Has nobody else had this problem?
Did you try different USB ports on your computer? I was kind of experiencing the same thing. I'm also running Windows 7 Enterprise x64. My explorer window would freeze up when I tried to transfer data from my PC to the Xoom. While frozen, switching from/to normal/debugging mode would unfreeze things, until I tried copying again.
My problem was resolved when I connected my Xoom to another USB port on my PC, one that was integrated with the motherboard. Previously, I was plugging it into one of the front USB ports.
So my suggestion is to try a different USB port, preferably one that's on the back of your PC.
i ran into the same issue as well.
this was fixed by changing to a different usb cable, and inserting it into a different port.
if you're connecting it to the front of your computer USB connector, try connecting via back of your desktop computer.
this worked for me.
Like another poster has suggested, the usb ports on the front of the base unit or ports on a usb hub might not be powerful enough to run the Xoom. I've had the same thing with external hard drives.
Sent from my Desire HD using XDA App
I've successfully connected my xoom to 3 Win x64 Enterprise boxes.
If I had to guess, I'd say that your front USB ports are either failing or under powered. I assume that you've tried a USB port on the back?
Sent from my Xoom using XDA Premium App
I am trying to install the Samsung Intercept (Virgin Mobile) on my Windows 7 netbook. I could never connect the device before to either WinXP or Win7. I recently factory reset my phone and after installing the drivers on WinXP, the phone showed that it was connected. I mounted the SD card to the computer and it never showed the drive. I unmounted and disconnected and since then it never connected. I keep getting that it's not recognized.
On my Win7 computer, I installed the drivers (had to force Windows to find the driver). Now the computer senses that it's connected, but it says "the device cannot be started". So I'm thinking that my P.O.S. phone can't figure out wtf USB mode is. It showed it once and that's it.
I've tried probably 3 or 4 different drivers and now I can't figure out how to just start clean. I don't even think I need to because the computer driver installed fine (It says Samsung USB Android whatever when it's connected). I tried with USB debugging on and off.
I even tried to make a virtual Windows XP to try it on a fresh install, but VM won't take unknown USB devices.
I uninstalled all my drivers, even the USB hub drivers, rebooted after the uninstall. No luck.
Before I reinstalled the hub I tried to force XP to the drivers (different ones not the same driver over and over) and now its saying "the file does not contain any information about this device". WTF?!
I'm so confused with this stupid driver that I can't take it anymore. I'm now considering reformatting my computer, but it's not worth it just to root a phone. I'd rather put up with my phone needing a battery pull at least once a day than to lose all my files.
caderyn19 said:
I am trying to install the Samsung Intercept (Virgin Mobile) on my Windows 7 netbook. I could never connect the device before to either WinXP or Win7. I recently factory reset my phone and after installing the drivers on WinXP, the phone showed that it was connected. I mounted the SD card to the computer and it never showed the drive. I unmounted and disconnected and since then it never connected. I keep getting that it's not recognized.
On my Win7 computer, I installed the drivers (had to force Windows to find the driver). Now the computer senses that it's connected, but it says "the device cannot be started". So I'm thinking that my P.O.S. phone can't figure out wtf USB mode is. It showed it once and that's it.
I've tried probably 3 or 4 different drivers and now I can't figure out how to just start clean. I don't even think I need to because the computer driver installed fine (It says Samsung USB Android whatever when it's connected). I tried with USB debugging on and off.
Click to expand...
Click to collapse
I had the same issue too.
Have you tried using another USB cable? If you're using the cable that came with the phone it wont work (well sometimes). What you can do is find or buy another Micro USB cable for your intercept. You can buy one off amazon for less than $10. I brought mine from Best buy for $20. It works fantastically.
scream4cheese said:
I had the same issue too.
Have you tried using another USB cable? If you're using the cable that came with the phone it wont work (well sometimes). What you can do is find or buy another Micro USB cable for your intercept. You can buy one off amazon for less than $10. I brought mine from Best buy for $20. It works fantastic.
Click to expand...
Click to collapse
I was seriously considering another cable because I read in some other threads pretty much what you just told me, but I guess I was one of those "on the twelth time it finally connects" type of situations. I connected it last night and it worked. Just need to update my SDK stuff, make sure I have all my info for SuperOneClick, and cross my fingers lol!
Thank you for your advice. If it stops working I'm gettilng a new cable.
[EDIT] and it stopped working... I knew I should've just rooted when I had it connected, but I wanted to back my stuff up. Looks like I'm getting a new cable lol.
Sent from my SPH-M910 using Tapatalk
[EDIT] You were totally right! It's the cable. I got a Belkin for $15 at Target. I plugged it in and immediately Windows 7 Pro 32-bit detected the drivers, the handset, and installed it. Now time for rooting
I know it's been a couple of months, but I'm curious if you've had any other problems with connecting?
I was having the same problem and I had a few cables that I tried with no luck. I also tried my wife's Blackberry cable, which is a thicker cable that claims to be a "DATA" cable...no go.
I probably will just go buy the Belkin one you referred to if you've had no other problems.
Thanks!
-- Sent from my Galaxy Tab using Tapatalk
GreyCelt said:
I know it's been a couple of months, but I'm curious if you've had any other problems with connecting?
I was having the same problem and I had a few cables that I tried with no luck. I also tried my wife's Blackberry cable, which is a thicker cable that claims to be a "DATA" cable...no go.
I probably will just go buy the Belkin one you referred to if you've had no other problems.
Thanks!
-- Sent from my Galaxy Tab using Tapatalk
Click to expand...
Click to collapse
I actually have had no problems (on my Win7 PC) since the install. As for my XP computer, I just gave up on trying to get it to work. Try completely uninstalling every instance of the Samsung programs (I went through my registry *dangerous*) and all things Android and reboot to a fresh power cycle (like with the phone) so Windows can update all its important files reguarding the driver removal. Then install and THEN plugin.
It literally randomly worked for me. I had the drivers installed properly, but the charging cord gave me "bad driver install". I didn't change a thing and plugged in wth the Belkin and was good to go.
Hope you can get it working! I know the anticipation of phone modding, and I love it! Lol!
Sent from my SPH-M910 using Tapatalk
Ditto, ditto and ditto! I have the same thing with my intercept, except I started on win7/64, could not get anything going. Then created an XP VM - over my dead body - no go.
Using the same cable, if I plug in my Captivate, everything comes up.
For you guys, when you bought a different cable, what did you buy? micro-to-micro USB? Or something else?
J
I usually use the cables that came with my HTC phones. Also I have better luck if I reboot the phone prior to connecting it to the PC.
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.
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.
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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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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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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 =)