[Q] Phone charges but computer doesn't recognize as device. - Nexus 4 Q&A, Help & Troubleshooting

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!

Related

USB Problems Since Upgrade to 2.2.1

Since upgrading the Galaxy S to 2.2.1 which I absolutely love - must faster than anything previous, sleek, really well done, I've just noticed for the first time that my USB doesn't seem to work.
The computer sometimes sees it but just says the device is malfunctioning, the phone sometimes sees the PC and gives a menu for "ask on connection", but Windows just does not know what this device is at all.
Suspect I may have to reinstall the drivers fully in Windows, remove it completely and try again, if it actually showed up as an unknown device in Device Manager.
I do need to try another PC and cable just in case, but this is what Im having at the moment in Windows:
USB Device Not Recognized
One of the USB devices attached to this computer has malfunctioned, and Windows does not recognize it.
Click to expand...
Click to collapse
And the Phone is currently not detecting any connection.
Any thoughts?
Cheers
Simon
I would go with a windows problem and remove the usb drivers/Kies .
Followed by fresh install .
jje
You can find a link to the usb drivers in my signature.
I think its a little more problematic.
I've tried another computer, another OS and another cable no joy.
I've installed aLogCat and Im getting:
Intent Action android.intent.action.ACTION_POWER_CONNECTED
Battery charging.plugType = 1
AC Charge
In MtpReceiverandroid.intent.action.ACTION_POWER_CONNECTED
Battery charging.plugType = 1
Not of USB charging. Dont lauch MTP APP
Click to expand...
Click to collapse
I've done a quick search on this. Hopefully this is as simple as doing a factory reset and format the internal sd.
If not, then Im off to a samsung service centre I think.
Any further thoughts?
:-(
Factory reset the phone, but the USB port still is not working. Charges fine, but don't connect over USB to the PC.
Can it be in debugging mode. Try to switch between mass storage and kies.
Probably you have checked that already..
Sent from my GT-I9000 using XDA App
the same problem from me i tried all but the usb is not working at all. I flashed kernel , i flashed rom but nothing .
Now i am looking to install untouched rom in order to give it to service but when i am trying to flash from recovery i get an error . Any suggestions?
This may sound dumb, but it could be the USB port acting up (loose connection). Try wriggling the cable around or use a different port.
alumine said:
This may sound dumb, but it could be the USB port acting up (loose connection). Try wriggling the cable around or use a different port.
Click to expand...
Click to collapse
I test the usb in all the modes (recovery and download also). I used different computers but the same thing
alumine said:
This may sound dumb, but it could be the USB port acting up (loose connection). Try wriggling the cable around or use a different port.
Click to expand...
Click to collapse
Right, I've tried all available USB ports, two different computers, two different OS's. The phone just does not register a USB data connection. It only recognises AC charging according to the logs.
I think I have a broken USB port on the phone as if I jam the connector in at an angle on the phone, it sometimes registers the data connection but its far too unreliable.
Development mode don't work, Kies, Mass Storage etc... anything. Nothing works.
Factory reset doesn't make it work.
I can't even flash a new ROM as the phone is not detected in download mode.
I've got the phone booked in at a Samsung Service Centre now. I've seen a few webpages referencing corrosion. I tell you what though, this phone has been protected way way more than my old N97. I've had so many phones and not one has suffered from "corrosion". So let them just try and say it's my fault. Im ready for em.
sjdean said:
Right, I've tried all available USB ports, two different computers, two different OS's. The phone just does not register a USB data connection. It only recognises AC charging according to the logs.
I think I have a broken USB port on the phone as if I jam the connector in at an angle on the phone, it sometimes registers the data connection but its far too unreliable.
Development mode don't work, Kies, Mass Storage etc... anything. Nothing works.
Factory reset doesn't make it work.
I can't even flash a new ROM as the phone is not detected in download mode.
I've got the phone booked in at a Samsung Service Centre now. I've seen a few webpages referencing corrosion. I tell you what though, this phone has been protected way way more than my old N97. I've had so many phones and not one has suffered from "corrosion". So let them just try and say it's my fault. Im ready for em.
Click to expand...
Click to collapse
Try cleaning your phone usb port. A guy named omersak had the same problem, and he had solved it. Search for the thread started by him, and how he has solved it.
I hope you can solve it without going to the service centre. And good luck.
Sent from my GT-I9000 using XDA App
Definitely trying that first - thank you to all the people that have been doing the investigation.
It sounds to me like Samsung have got a bad batch of USB connectors that should be replaced under a factory recall.
I don't use mine in a shower, or sauna, or anything like that, I don't even use it in the rain.
The closest it gets to any humidity is being in my shirt pocket from time to time.
Im going to get some meths or something like that and some thin paper and see what I can do with that. Im just off to Homebase!
there are similar problems on the galaxy 3 series where usb suddenly stops working. the following solutions seem to work there:
1. dial *#7284# to open "PhoneUtil"
2. in USB section, switch to modem, and then switch back to PDA
if that doesn't work: reboot into recovery and select "wipe cache partition"
*hth*
I've tried both of those before I start splashing the methylated spirit around. Still no joy.
Wipe Cache don't work, as well as wipe data/format sd/restore factory defaults etc.
I think I've got a 100% hardware fault.
@OP,
I am terribly sorry about your case. Looks like you need to make that trip to the service centre.
At least you have tried out every possible means known.
Sent from my GT-I9000 using XDA App
Also tried the meths. No good. :-(
The USB just started working yesterday. Still a bit intermittent, but when it gets a connection, it maintains a connection.
I've just ordered some isopropyl and a gold plated USB connector to be on the safe side
Hi everyone,
To sdjean: maybe you could read the post I sent a few minutes ago:
forum.xda-developers.com/showthread.php?p=12593413#post12593413
It might explain why your usb data connection does not always work ...
Regards.
I have a Samsung GT-I9000B and I cant use it using USB.
I have 2 usb cables, I am able to find my friends phones.
Now I cant change rom cause odin cant find it too.
Alog cat shows:
E/MTPRx ( 4020 ) Battery charging. plugType = 1
E/MTPRx ( 4020 ) Not of USB charging. DOnt launch MTP APP
Any suggestion?
I'm not an Expert but 2 hints from me:
1. If you have'nt tried yet: Install usb-drivers on pc new and then connect your phone and wait until drivers are installed to your phone.
One times this way worked on my i9000.
2. Look for a zipped rom on xda which you can directly download and install from sd-card.
Sorry, I know my English is bad.
Sent from my GT-I9001 using xda premium

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.

Nexus 4 is not recognized by computer

Hello.
Three weeks ago my Nexus 4 is recognized by my three computers (work, home and friend) like a drive. Now it is not anymore recognized by friend 's computer: I hear the sound of connection but no change in file manager. However it works fine on two other computers (home and work). In addition the Nexus 4 of my friend is always recognized by these three computers.
I tried to install N4 drivers on Friend 's computer. No change, my Nexus 4 is not recognized by friend's computer. I tried the debug mode too. No change. And the nexus 4 of my friend works on the three comptuters. Very frustrating .
These two Nexus 4 is updated with 4.2.2, in stock rom, not rooted, 16Go, v11.
Does someone could help me to solve this problem without saving my data and then restoring to factory values?:highfive:
Thanks.
I forgot to write that i used only one usb wire on the same usb port. To be sure that the problem is not the wire or the usb plug.
Do you currently have USB Debugging turned on? Turn it off and see what happens...the reason I say is that my work PC can either see is as MTP with USB Debugging off or through adb with it on - not both.
My Windows 8 Pro laptop at home works fine for both at the same time...worth checking out
Maybe try to uninstall the driver using the device manager?
Sent from my Nexus 4
EddyOS said:
Do you currently have USB Debugging turned on? Turn it off and see what happens...the reason I say is that my work PC can either see is as MTP with USB Debugging off or through adb with it on - not both.
My Windows 8 Pro laptop at home works fine for both at the same time...worth checking out
Click to expand...
Click to collapse
nhatters said:
Maybe try to uninstall the driver using the device manager?
Thanks for your answer. I will try your solution today. But I don't understand why the other nexus, unlike mine works fine on every computer.
Sent from my Nexus 4
Click to expand...
Click to collapse
Envoyé depuis mon Nexus 4
EddyOS said:
Do you currently have USB Debugging turned on? Turn it off and see what happens...the reason I say is that my work PC can either see is as MTP with USB Debugging off or through adb with it on - not both.
My Windows 8 Pro laptop at home works fine for both at the same time...worth checking out
Click to expand...
Click to collapse
nhatters said:
Maybe try to uninstall the driver using the device manager?
Sent from my Nexus 4
Click to expand...
Click to collapse
Thanks i will try your solutions tomorrow. But these solutions doesn't explain why one Nexus 4 works on the friend 's computer and the other Nexus 4 doesn t work: same wire and same usb plug.
I plugged the nexus on my computer. And I unistalled the driver of nexus in my device manager unplugged and plugged again the nexus. And then let windows recognize the nexus and install his own compatible driver. Thanks nhatters.
The problem was that for run application named carbon I had to install in computer first the adb driver and carbon for computer. And this driver does not recognize my nexus which have not carbon (for mobile install).
i had the same problem few minutes ago .. i just turned USB Debugging on and voila the PC detected my nexus 4.
Aha i had the same problem i just lowered the notification shade selected usb device n selected camera option and reverted back to the media transfer and that fixed it
I am having the same issue but nothing seems to work and I dont even hear the connection sound in windows. I've tried uninstalling and installing drivers with sdk, device manager, and the other thing in windows which is callew dew I think and nothing no success, also I have tried to disable usb sebugging and mtf media storage and nothing. Is the only thing left to is buy a new micro usb cable?
juan_carlos__007 said:
I am having the same issue but nothing seems to work and I dont even hear the connection sound in windows. I've tried uninstalling and installing drivers with sdk, device manager, and the other thing in windows which is callew dew I think and nothing no success, also I have tried to disable usb sebugging and mtf media storage and nothing. Is the only thing left to is buy a new micro usb cable?
Click to expand...
Click to collapse
Same problem for me on Windows 7. I have tried everything - different cables, different ports, enable/disable USB debugging. Even uninstalled drivers etc. It is getting detected on Windblows and is showing up in the taskbar as an USB device with a green mark. But it is not showing up as a drive or the MTP device. Frustrating to no end!
im gonna try to research in microsoft website which drivers are not originally installed in my computer and delete all the wird ones maybe some other driver from another hardeare like another cell phone or something is interfering. Hope I dont delete something that will make my computer not work right.
Same here, I can no longer transfer any files on to my Nexus 4 anymore. I'm using a PC and it no longer reads it. Only fast boot and adb on recovery works.
Sent from my Nexus 4 using xda app-developers app
reiko09 said:
Same here, I can no longer transfer any files on to my Nexus 4 anymore. I'm using a PC and it no longer reads it. Only fast boot and adb on recovery works.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
It's not the same because I've tried adb and nothing. Your problem can be fixed by modifying google drivers. In the other hand I tried a friends nokia phone with same usb cable and started installing drivers right away.. Mine does nothing, not even a connection sound just charging. so It's not the cable. I'm starting to think the micro usb port got damaged or something really wrong with the rom but still I've tried to see if reseting the phone works and nothing.
Seems like its an issue with 4.2.2. Since last week my N4 was acting very strange. when I connect to my pc; It would connect and disconnect every second. After checking in Device Manager; my Nexus 4 was listed under SAMSUNG Android Phone . I end up uninstalling it (plus check delete driver software). Then I rebooted my computer. It reinstalled the driver and now its working. Thought my wire was broke.
This worked for me, it shall work for everyone else
Open the start menu and type in device manager and click on it, it should npbringba window up. Now at the stop it should say android device or something similar, drop down that section and right click to delete "Google ADB Interface" which was for me should be for you also. After make sure you check the box in the confirmation to delete the driver. Reboot your PC plug in your device and enjoy!!!

[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 =)

Problem after replaced the USB flex cabel

Hi everybody, I've replaced my faulty USB flex cable with a new one, the phone charges, but it shows "Unknown device" in my PC, it just continually connect and disconnect from the PC, also the phone don't show the message when I connect to the PC, need help!!!
Thanks for any help.
Sent from my Nexus 4 using XDA Premium 4 mobile app
serch826 said:
Hi everybody, I've replaced my faulty USB flex cable with a new one, the phone charges, but it shows "Unknown device" in my PC, it just continually connect and disconnect from the PC, also the phone don't show the message when I connect to the PC, need help!!!
Thanks for any help.
Sent from my Nexus 4 using XDA Premium 4 mobile app
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It so sounds like a cheap cable..or a defective one.
I'd try a different cable/USB Port or uninstalling the drivers then plugging the phone back in and let it re-install upon reconnecting.
mrhiab said:
It so sounds like a cheap cable..or a defective one.
I'd try a different cable/USB Port or uninstalling the drivers then plugging the phone back in and let it re-install upon reconnecting.
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Thanks fr your answer, i´ve try with another also new cable with the same problem, it is not the windows driver,, it´s some stranger issue, connects and reconnects constantly with the PC showing "Unknown Device"
USB debugging enabled?
mrhiab said:
It so sounds like a cheap cable..or a defective one.
I'd try a different cable/USB Port or uninstalling the drivers then plugging the phone back in and let it re-install upon reconnecting.
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Click to collapse
mrhiab said:
USB debugging enabled?
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Yes and both try with MTP PTP nothing, even the phone does not recognize when you connect the cable from the pc, but works as a charger.
Where did you get the part? It's probably a copy or defective.
From EBay, from two differents sellers
Sent from my Nexus 4 using XDA Premium 4 mobile app
Was that the problem you had even before replacing the usb flex?
magote said:
Was that the problem you had even before replacing the usb flex?
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no, the original broke and stopped working
Finally solved
Finally after searching and researching I found that it was a software compatibility problem, so I found the Franco kernel (ziddey-otg-R193-JSS-CM-10262031) having the all drivers that needs for the phone to recognize the USB, now works properly with the PC and everything else.
So we know what is the problem with those new USB flex cables
I hope this will help others with same issue.:laugh:

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