When I connect to my work laptop (Macbook Pro), my phone connects as an installer. After a few seconds, it switches to a media device connection. I have the Developer Options enabled and the USB Debugging option selected, but it keeps getting turned off as soon as the phone is connected via USB cable.
It was working properly last week, but I updated to MacOS 10.10.5 over the weekend, and now it won't see my phone in USB Debugging mode.
Due to the timing of the MaxOS update, I do not believe this is an error with my phone or Android, but I'm hoping some other Macbook users may have encountered and resolved this issue. I've been unsuccessful in tracking down anything helpful, partly because of the voluminous search results for "USB debugging." I'd appreciate any help available.
I'm running 4.4.2, rooted but otherwise stock.
Thanks!
Even though no one else replied here, I thought I'd post my resolution in the event that someone else with the same problem stumbles across this thread in the future. The short version: enter *#0808# into your dial pad and you should get the USBSettings screen where you can choose from several options how your phone handles a USB connection. I ended up landing on the "DM + Modem + ADB" mode, which allowed my laptop to talk to my phone again. No clue what caused the problem in the first place, nor why USB Debugging mode itself didn't stick, but this resolved it for me. Hope it works for others, as well...
This issue has been bothering me for such a long time. It started since I updated my G2 to android 5.0.1 lollipop, and I couldn't connect my phone to PC for a long time. File transfer has been so difficult as I have to upload pics and files to Google Drive then DL from computer. What's more, I don't even want to swipe my phone or reset to factory because the backup process would be so difficult without a computer! Spent lots of time searching for fix online but never found one, and I kind of gave up long ago.
Yesterday this issue popped backed into my head and I tried to look for answers online again. After hours of searching still can't find useful tips. Trust me, I've tried all the tips I found online, including change USB ports, change USB cable, use different computer, uninstall/reinstall USB drivers on computer, enable developer option's on phone, enable USB debugging, etc. Non has worked, just as before. I know this issue should be the problem of the phone instead of the computer, and luckily I crossed over a thread of a people with MIUI having somewhat similar problem, and he solved it by installing a MIUI USB app. So I searched for similar apps, and BINGO! my problem solved! So here's my solution:
I went to Google Play and search for "LG USB", and installed the first app says "USB Driver for Android":
imgur.com/x81eztb
I guess the key word is "USB driver", and other similar apps should work too.
The App is very simple. Just tap on the MTP button:
imgur.com/j7enxFn
And the long lost USB connection options reappears!!!
imgur.com/cZjO8xl
My phone is in Chinese but I think it's simple to find the corresponding app and options in English system. I think what the APP does is simply take you to the USB connection options page, which is hidden somewhere in your phone but can't be found.
I guess the problem is that when updated to Lollipop, some phones got this bug that the USB connection type selection menu somehow doesn't show up when connected to PC. While I was looking for solution online, I found that not only G2 users, but people with G3 and even non-LG phones got the same problem. For LG, I don't know what they're thinking as they even took away the "USB PC connection" option menu (as the last picture) in "Settings", making it impossible for users to manually choose connection type when this bug occurs. (I found that other brands' phones kept this option in settings->storage)
Any way, just happy to solve a problem bothered me for over a year and want to share my solution. Wish this post will help people who got the same problem as I did.
PS. It says I can't post links, so I can't post the screen shots' full links. But I guess this solution is not hard to understand even without pics.
Thanks for the solution but in my case - after installation - menu USB PC connection appears but unfortunately disappears in a sec.
Is like someone push the back button .
Probably there is a software who creates the problem but i do not know how to find it in order to close it or uninstall it.
Any idea?
Thanks in advance.
Hello, I've had the V20 for a number of months now and love the phone, but I never tested out a data connection before, only to find out that when I use both the LG cable and a Anker USB3.0 cable, my phone is not able to connect to any computer. The system prompt to select the MTP or PTP connection appears, but after making a selection and the computer seeing the phone for a split second, the connection is lost and the USB prompt appears rapidly over and over again. I even went into developer options and set MTP connection always.
I tried a reboot, battery pull and capacitor discharge, and a full system restore. No fix. The only work around I have now is a samba server or moving files with the SD card manually.
Please, if you have any ideas? Does not work in Windows and Linux.
Thank you.
Have you installed LG bridge?
Sent from my LG-H990 using Tapatalk
dbo989 said:
Hello, I've had the V20 for a number of months now and love the phone, but I never tested out a data connection before, only to find out that when I use both the LG cable and a Anker USB3.0 cable, my phone is not able to connect to any computer. The system prompt to select the MTP or PTP connection appears, but after making a selection and the computer seeing the phone for a split second, the connection is lost and the USB prompt appears rapidly over and over again. I even went into developer options and set MTP connection always.
I tried a reboot, battery pull and capacitor discharge, and a full system restore. No fix. The only work around I have now is a samba server or moving files with the SD card manually.
Please, if you have any ideas? Does not work in Windows and Linux.
Thank you.
Click to expand...
Click to collapse
Did you enable USB debugging in Developer options? If no, enable it.
Change the power settings in windows for the USB.
Power options
Advanced settings
Disable "USB selective suspend setting"
Tried all the above
Pierre118 said:
Did you enable USB debugging in Developer options? If no, enable it.
Click to expand...
Click to collapse
Yes, USB debugging works and I'm able to use ADB with my phone and both the Windows laptop and Linux Desktop. However, neither is able to reliably connect through the typical MTP and PTP methods. I finally got MTP to limitedly work with MTP when I use the LG supplied cable and ignore the USB connection prompt in Windows and Linux. I go straight to File Explorer and access the file directory of the phone. Every time I open a folder or access a file though, the phone rapidly pops up the USB connection message over and over while the file moves.
All third party cables and USB devices are not working other than just charging. In Linux, the error message in my logs is:
usbfs: process 20678 (mtp.so) did not claim interface 0 before use
reset high-speed USB device number 101 using xhci_hcd
dbo989 said:
Yes, USB debugging works and I'm able to use ADB with my phone and both the Windows laptop and Linux Desktop. However, neither is able to reliably connect through the typical MTP and PTP methods. I finally got MTP to limitedly work with MTP when I use the LG supplied cable and ignore the USB connection prompt in Windows and Linux. I go straight to File Explorer and access the file directory of the phone. Every time I open a folder or access a file though, the phone rapidly pops up the USB connection message over and over while the file moves.
All third party cables and USB devices are not working other than just charging. In Linux, the error message in my logs is:
usbfs: process 20678 (mtp.so) did not claim interface 0 before use
reset high-speed USB device number 101 using xhci_hcd
Click to expand...
Click to collapse
Is this behaviour on accessing and copying? You can not copy a file from your Windows laptop to the phone?
Yes, I cannot open folder directories, nor move files from phone to computer or visa versa.
Also. Try to not let the phone screen turn off. Change display time to 15 minutes or something.. Change back when finished. GL
kaluna00 said:
Also. Try to not let the phone screen turn off. Change display time to 15 minutes or something.. Change back when finished. GL
Click to expand...
Click to collapse
No change.
dbo989, did you resolve this issue? By any chance are you running avast mobile security? I was able to transfer files both ways via USB and had the pull down USB options without ever having to add USB debugging. Then I installed AVAST and USB has become charge only... none of the widely recommended solutions above will unlock USB. I see no apparent settings in AVAST so I will call them. If no resolution then I will trash Avast
bcapollo said:
dbo989, did you resolve this issue? By any chance are you running avast mobile security? I was able to transfer files both ways via USB and had the pull down USB options without ever having to add USB debugging. Then I installed AVAST and USB has become charge only... none of the widely recommended solutions above will unlock USB. I see no apparent settings in AVAST so I will call them. If no resolution then I will trash Avast
Click to expand...
Click to collapse
No, I never could resolve it. I ended up using Samba to fileshare with home computer, but lost any OTG cable ability. Never used antivirus or security software with my phone.
dbo989 said:
No, I never could resolve it. I ended up using Samba to fileshare with home computer, but lost any OTG cable ability. Never used antivirus or security software with my phone.
Click to expand...
Click to collapse
Just fixed it... turned out to be the port on my PC, I switched ports and its back as it was, no need to enable dev mode or USB debug... its still slow connection... I have to look up Samba solution, never used it.
Thanks for sharing
I just experienced the same problem with the USB connection constantly cycling between being plugged in and not. Windows kept alternating between the device connected and disconnected system sounds. I unplugged the USB 3.0 to USB-C cable on both ends, unkinked and straightened it, and plugged the cable back into the PC and the phone. Hasn't made another peep for the last half hour and the phone is staying in USB file transfer mode. I wiggled the cable at the phone end and still no further disconnections. Maybe I didn't connect the cable securely at the PC end the first time.
This is the first time this has happened since I started setting up the phone this week, so I don't know what to make of it. Regardless, I need to order some more USB-A to USB-C cables since this is my only one.
USB File Transfer Issue - Resolved
Hi, I had the exact same issue with the computer not seeing the phone as far as files. I was still able to use ADB, Fastboot, etc, so I figure it was not a hardware problem. Tried two different computers as well. Every time I selected "File Transfer" in the USB settings, the phone would beep, and when connected to the computer, the computer made the usual chime. The phone would not show up in explorer still.
Previously this phone had been rooted, but I wanted to bring it back to stock. I had flashed the latest KDZ file. Then using ADB and Fastboot locked the bootloader. It seems that the USB issue happened after that. Here is what finally fixed it:
Turned on developer options the usual way (tapping build number in software info) and then turned off "Allow OEM Unlock." Then I turned off developer options. Still, no luck, so I then re-flashed the latest KDZ (H91820h) again, but this time with the bootloader locked.
After everything was done, I set the phone up again, and now file transfer works perfectly.
I did not want to chance locking the bootloader while the phone was still rooted. I learned the hard way about that, and nearly bricked the phone once before. Luckily I still had factory upload saved in the LAF partition.
Hope this helps someone out there.
Turns out it was not fixed permanently
lighttech said:
Hi, I had the exact same issue with the computer not seeing the phone as far as files. I was still able to use ADB, Fastboot, etc, so I figure it was not a hardware problem. Tried two different computers as well. Every time I selected "File Transfer" in the USB settings, the phone would beep, and when connected to the computer, the computer made the usual chime. The phone would not show up in explorer still.
Previously this phone had been rooted, but I wanted to bring it back to stock. I had flashed the latest KDZ file. Then using ADB and Fastboot locked the bootloader. It seems that the USB issue happened after that. Here is what finally fixed it:
Turned on developer options the usual way (tapping build number in software info) and then turned off "Allow OEM Unlock." Then I turned off developer options. Still, no luck, so I then re-flashed the latest KDZ (H91820h) again, but this time with the bootloader locked.
After everything was done, I set the phone up again, and now file transfer works perfectly.
I did not want to chance locking the bootloader while the phone was still rooted. I learned the hard way about that, and nearly bricked the phone once before. Luckily I still had factory upload saved in the LAF partition.
Hope this helps someone out there.
Click to expand...
Click to collapse
After thinking it was in fact fixed, I rebooted the phone several times, turned off, then on, and all seemed well. Until the next morning. I turned it on, and the same issue happened again. No File Transfer mode to computer. ADB still worked. After being on for a while and getting warm, all of a sudden file transfer started working again. Rebooted, and turned on and off, and it continued to work. I figure its a bad part with a thermal issue somewhere so I put it in the freezer for 5 minutes. When booted up again, the same problem occurred until the phone warmed up. Weird? So I tried something completely different. I downgraded the phone to H91810p and tested again. It seemed to work fine. I put it in the freezer again, and the problem will not show itself. For whatever strange reason the problem appears to be heat related, and ONLY happens with the latest KDZ, Oreo 8.0 The only thing that I can theorize is that the SOC is bad, or there is a bad area of flash memory that is intermittent.
Does anyone have any clues? I am going to put it back in the freezer, go to work, and test again when I get home to confirm.
Craig
Hello guys,
I bought a ZTE AXON 7 A2017G and wanted to use it as personal hotspot on my PC via USB. The interface MUI of this phone is not so good not intuitive and when I switch the USB Tethering supposed to do just that it's bringing a screen of how I want to connect by USB and not working to share the 4G connection to my PC. I tried all options to ‘only charge’ to ‘MTP’ etc. I use Windows 10 64bits, already installed the driver from the phone and I tried many solutions like changing the network adapter driver from device manager to RDNIS 6 or ZTE RDNIS ect. But it still doesn't work actually it does stuck the UI screens related to network when I connect the phone.
Anyone has a solution to make this work without rooting the phone? I still have a warranty so I don't want to root it while I still have it.
Thanks !
yann360 said:
Hello guys,
I bought a ZTE AXON 7 A2017G and wanted to use it as personal hotspot on my PC via USB. The interface MUI of this phone is not so good not intuitive and when I switch the USB Tethering supposed to do just that it's bringing a screen of how I want to connect by USB and not working to share the 4G connection to my PC. I tried all options to ‘only charge’ to ‘MTP’ etc. I use Windows 10 64bits, already installed the driver from the phone and I tried many solutions like changing the network adapter driver from device manager to RDNIS 6 or ZTE RDNIS ect. But it still doesn't work actually it does stuck the UI screens related to network when I connect the phone.
Anyone has a solution to make this work without rooting the phone? I still have a warranty so I don't want to root it while I still have it.
Thanks !
Click to expand...
Click to collapse
You don't lose the warranty automatically by unlocking. They have no way to know if you relocked it before sending it in (and even if you send it unlocked, there's an EU law that says that they have to prove that the software modification caused the problem). Broken screens aren't caused by LineageOS afaik...
Okay, back to the topic at hand: I have a Win10 x64 PC. I connected the USB cable to the PC, then to the phone, then went to the settings and enabled USB tethering. After a second the PC asked me if I wanted to connect to a new network. So there's definitely something wrong on your side.
After you hit tbe USB tethering option don't touch the connection options that appear (the MTP, PTP, install driver stuff), just leave them as-is
So i have the LG v20 H-990 (elsa) non rooted phone with Android 7.... Im trying to get it to connect to my pc but it wont work..i have usb drivers and lg drivers 4.2 plus i have lg bridge installed but as soon as i plug phone in...it just starts charging...
So in developer options i saw its set to mtp (media transfer protocol) and i cant cgange it even if i select sometging else it just goes back to mtp... So i tried turning usb debugging on...yet no joy....its not that the PC is not picking up the phone but more like tye phone is not letting connection ....well connect...please help?? I want to try and get some backups going and updates and also play with photos and vids ....please please please help
You have an H990 or an LS997? Also, the phone will charge, even on MTP(which is what it uses to communicate with PC), so you don't have to try to force stop it. Have you gone into device manager or ADB to verify your PC isn't reading the phone?
Sent from my LG-LS997 using Tapatalk
I have the h-990 and yes i have gone to device manager and there is nothing...
I've been having the same problem I couldn't change USB connection type from mtp to charging or ptp etc...what I found is if I try to change it from the developer menu it doesn't want to work, but if I bring down the notifications shade and expand the notification for it and change it with the popup it tends to work most times...I did have one time I couldn't get it to work at all until I factory reset my phone (wiped and reflashed ROM but I'm rooted and rom'd)... Sometimes restarting both phone and PC works...I'm not sure what it is it seems to be different on every PC I hookup to ...oh and sometimes I've toggled USB debugging off then on and that helped....so without several people having the problem and all trying to collect information about types of PC and cables and other individual variables I figured its some kind of glitch or some code error somewhere that under certain circumstances makes the v20 stupid, that likely won't be fixed or solved...this is just my experience , i thought maybe one of the things that seemed to help me might help you....good luck