Develop Bugs

[Q] after installing android SDK and rooting Nexus File transfer stops working

I've never had a problem with android file transfer up till I rooted today. My wife has a stock Nexus 7 and I can plug her Nexus into my computer and the file transfer app will start. I have usb debugging turned on and the usb connection on my tablet is set to Media device.
Now as I'm typing this my Nexus has been connect to my mac for about an hour. I just went to the USB settings to make sure I had Media device selected and the file transfer window popped up out of nowhere. I killed it and tried again and it won't come up. Maybe in an hour or so if it does the same thing.
Any ideas as to what's going on? Very strange behavior.

Disable USB debugging.
Unplug/plug in your nexus.
The USB IDs change for some reason when you have USB debugging turned on and the MTP device isn't recognized as such. PTP (camera) mode continues to work for both cases though.

Thanks for the suggestion but It still fails. I disabled debugging and still can't connect. Switching USB modes didn't help either.

If that doesn't work uninstall the adb driver & then plug your tablet back in so it will reinstall

My next suggestion would to reboot the tablet with USB debugging turned off.
If that doesn't work, my next suggestion would be to delete the existing drivers and force reinstall.
All with USB debugging turned off.

johnnyninja said:
I've never had a problem with android file transfer up till I rooted today. My wife has a stock Nexus 7 and I can plug her Nexus into my computer and the file transfer app will start. I have usb debugging turned on and the usb connection on my tablet is set to Media device.
Now as I'm typing this my Nexus has been connect to my mac for about an hour. I just went to the USB settings to make sure I had Media device selected and the file transfer window popped up out of nowhere. I killed it and tried again and it won't come up. Maybe in an hour or so if it does the same thing.
Any ideas as to what's going on? Very strange behavior.
Click to expand...
Click to collapse
Make sure after you plug in your device you're looking at your tab and click OK on the pop up........
Sent from my Nexus 7

Thanks for all the suggestions. It's working now. I was just about ready to delete the driver and the tablet started to be recognized consistently. I was in the settings screen and toggled debugging on and off while plugging in the tablet. I noticed the info bar at the top alternating between showing "debugging" and "media device" and I selected each one a couple of times when they came up. I think that it finally worked through the ID confusion that was mentions. I'll follow the the rest of the instructions if the problem comes back.
Thanks again.

It's acting up again so I'm going to try deleting the drivers. I thought I knew what to do but I can't find any information. What's the procedure to delete the driver? I'm running os x lion

I've tried every suggestion in all of these threads so far & nothing worked. Even after I deleted the ADB drivers, windows 7 would automatically reinstall them. When I tried to update the drivers, win7 said they already had the best drivers (ADB).
Here's what worked for me:
I had to turn off USB debugging, delete the ADB drivers in Device Manager, then reboot the device while it's still plugged in. Windows recognized the device as an MTP device & installed the drivers before it even fully booted.

I'm not sure how I finally resolved the problem on my mac. I toggled debugging on and off and rebooted a couple of times. That may have done it. I also ran the adb script in the SDK platform-tools folder. I don't know what that script does exactly but possibly it reinitialized the driver and ID.
Anyway, hopefully these workflows will work for others.

johnnyninja said:
I'm not sure how I finally resolved the problem on my mac. I toggled debugging on and off and rebooted a couple of times. That may have done it. I also ran the adb script in the SDK platform-tools folder. I don't know what that script does exactly but possibly it reinitialized the driver and ID.
Anyway, hopefully these workflows will work for others.
Click to expand...
Click to collapse
Rooted my nexus 7 (2012) last night and struggling with my laptop not recognizing it. This thread solved it!
Delete the ADB on my window, toggle off debugging and restart the nexus 7 with usb connected to laptop. works like a charm.
Thank you!

Guys, my N4 got this problem too.. until just a few minute ago
I read somewhere ini goge groups (i think N5 group), and found explanation that we can change ADB or MTP "mode" on device manager. On "Androoid ADB Device" right click and select "Update Driver Software". Click "Browse My Computer for Driver Software" and then "Let me pick from blablabla...." And then select MTP USB Device, "next" and my N4 detected on Windows Explorer.
Hope it will be usefull for you guys.

[Q] Stock Nexus wont connect to PC

Hello there, I got a new Nexus 7, running build JSS15J. Right out of the box everything worked fine. Upon connecting to wifi and updating to 4.3 the device would no longer connect to the computer. The only driver that installs when the device is plugged in is the Google Nexus ADB Interface. (And I still cant see it as an ADB device)
I plan to ultimately root the device, but cannot do so. I've factory reset the device, and still no connection with the PC.
I'm fairly certain it is not my computer as my Galaxy S4 still connects to my computer and is recognized.
More Info: The tablet connects through PTP (camera) mode and allows me to transfer files that way, but will not connect any other way.

See http://forum.xda-developers.com/showpost.php?p=44523227&postcount=101, it worked for me. I first used WUG's tools to unlock and root. Need to go to development option in settings, to allow debugging. If you don't have it, go to "about phone" and tap 7 times to activate.

mrdunn said:
See http://forum.xda-developers.com/showpost.php?p=44523227&postcount=101, it worked for me. I first used WUG's tools to unlock and root. Need to go to development option in settings, to allow debugging. If you don't have it, go to "about phone" and tap 7 times to activate.
Click to expand...
Click to collapse
I was planning on using WUG's Tools (already have them downloaded). I have debugging enabled and have disabled both MTP and PTP, still WUG's tools do not recognize my device. (my computer does not recognize it either)
The link you gave me solved the computer problem! I can now transfer via MTP! THANKS!
Next problem: WUG's Tools still do not recognize my device...
EDIT: Solved, just put it in PTP (camera) mode and it worked perfectly

[Q] My computer not recognizing MTP AT ALL

Hey guys. I been here for like 4 hours just dabbling with everything. And cannot seem to find any solution to this...
I have uninstall all drivers and restarted like ten times now doing the same process over and over, cleaning up each file carefully of the nexus or any android device.
My problem is when i plug in my nexus 7 2nd gen, it seems to not even detect squat.
I have usb debug enabled
my MTP is on
( if i switch to PTP i can access the folder)
Ive done fresh start on everything i even look through device and try changing the option to MTP and STILL DOES not work
I don't even see my nexus 7 in my HDD external or anything, nothing pops up but an ADB success driver, and when i changed it to MTP a MTP success driver with STILL no luck....
I just bought it today and it worked fine earlier, now when i root it and stuff it seems to be glitchy with my MTP
I even factory reset everything i couldn't access my ADB
any help would be appreciated

Someone said that manually updating the adb usb driver in devices should show you a choice, choose mtp. It should then sort itself out properly.

n9900229 said:
Hey guys. I been here for like 4 hours just dabbling with everything. And cannot seem to find any solution to this...
I have uninstall all drivers and restarted like ten times now doing the same process over and over, cleaning up each file carefully of the nexus or any android device.
My problem is when i plug in my nexus 7 2nd gen, it seems to not even detect squat.
I have usb debug enabled
my MTP is on
( if i switch to PTP i can access the folder)
Ive done fresh start on everything i even look through device and try changing the option to MTP and STILL DOES not work
I don't even see my nexus 7 in my HDD external or anything, nothing pops up but an ADB success driver, and when i changed it to MTP a MTP success driver with STILL no luck....
I just bought it today and it worked fine earlier, now when i root it and stuff it seems to be glitchy with my MTP
I even factory reset everything i couldn't access my ADB
any help would be appreciated
Click to expand...
Click to collapse
On your Nexus, open "settings", click on "Storage", click on options(3 vertical dots on the top right corner), click on "USB PC Connection", now check MTP option.
Try connecting to your PC (or Mac) now. I didn't have to do that on a stock build, but for some reason I had to do it on a couple of custom roms. Hope it helps ya out...

Try enabling USB debugging. I know it sounds odd but its helped me with my devices.
Sent from my Nexus 7 using Tapatalk 4

do this only if you can see PTP on PC
On PC check device manger, on Android if there is ADB driver - uninstall it
On N7 set to MTP, debug off and reboot with N7 USB cable connected to PC
It should re-install the ABD drivers on PC before N7 fully boots up
You will be back in action.

n9900229 said:
I have usb debug enabled
my MTP is on
Click to expand...
Click to collapse
Actually for me, it's the opposite. If usb debugging is on I can't access the device to view files. Try disabling it?

yea thanks though everyone I got it to work. I had my old nexus and new drivers mixing up my ports for some reason not being able to access it at all

[Q] Rooted Nexus 7 Unique MTP Issues

Ok so I have a rooted nexus 7 that won't show up as an mtp device ever since I rooted another nexus 7 on the same computer. I have uninstalled all the drivers and re installed them a million times with device manager and USBDview nothing works. It connects to other computers as an mtp device, however ever since I rooted the other nexus 7 on the same computer it won't work. Also I don't have access to the other nexus because it was my friends. Obviously it's a computer issue because it connects to other computers as an mtp. I'm really out of things to try as I have searched for this problem, but only found people saying to re install the drivers. I would really appreciate some help because I don't know what to do. Thanks.

bkbkaufman said:
Ok so I have a rooted nexus 7 that won't show up as an mtp device ever since I rooted another nexus 7 on the same computer. I have uninstalled all the drivers and re installed them a million times with device manager and USBDview nothing works. It connects to other computers as an mtp device, however ever since I rooted the other nexus 7 on the same computer it won't work. Also I don't have access to the other nexus because it was my friends. Obviously it's a computer issue because it connects to other computers as an mtp. I'm really out of things to try as I have searched for this problem, but only found people saying to re install the drivers. I would really appreciate some help because I don't know what to do. Thanks.
Click to expand...
Click to collapse
I also have weird issues. What I usually do is make sure the Nexus is configured for only one connection. So for MTP mounting I have PTP unchecked and USB debugging unchecked. Then I plug into the computer.
If it doesn't mount as MTP, I find it's usually because Windows has attempted to connect via ADB drivers. So I go into Device Manager and uninstall the device under "Android" while checking the box to remove drivers for the device. Then I unplug the Nexus and plug it back in, and it uses MTP drivers. I've always struggle with these driver issues for the Nexus, i don't know why it's so difficult. Good luck!

When I had issues with my mtp I had to uninstall adb drivers then plug my device back in so it would use mass storage and install the drivers. Somehow I have adb and mass storage working now with USB debugging on.
Check in device manager when you have adb uninstalled and see what your device comes up as.
Sent from my Nexus 7 using xda app-developers app

datallboy said:
When I had issues with my mtp I had to uninstall adb drivers then plug my device back in so it would use mass storage and install the drivers. Somehow I have adb and mass storage working now with USB debugging on.
Check in device manager when you have adb uninstalled and see what your device comes up as.
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
I uninstall the adb drivers but for some reason windows automatically installs them right back instead of mtp drivers and then if I go to update drivers and select mtp as an option it says it won't work

When I try to install the mtp drivers it says "Windows found driver software for your device but encountered an error while trying to install it...your device can't start" Then it automatically installs the adb drivers. What would be the reason it won't let me install the mtp usb drivers? Has anyone else encountered this?

PC wont recognize N7 for ADB

Hello. Im trying to root my N7 but my PC doesnt see it when I manually run adb or when I try auto root. I have done this before (when I first got it) without issue. Also I do have the drivers installed and the sdk so I am unsure why its not working. Additionally I tried on a 2nd pc and same thing. What am I missing? THanks!

RoachForLife said:
Hello. Im trying to root my N7 but my PC doesnt see it when I manually run adb or when I try auto root. I have done this before (when I first got it) without issue. Also I do have the drivers installed and the sdk so I am unsure why its not working. Additionally I tried on a 2nd pc and same thing. What am I missing? THanks!
Click to expand...
Click to collapse
Are you using the latest version of the Nexus Root Toolkit? It's got a driver installation guide to help these kinds of problems.
I often run into this with my Nexus 7. The two settings that have to be properly configured are enabling Android Debugging AND disabling Media device (MTP) in the storage settings (upper right hand corner - USB computer connection). Doing that usually allows the computer to detect the tablet as an ADB device, and go forward from there.
Good luck! Let us know how it goes.

thanks. downloaded the app but getting errors on my laptop (win8). will try on my pc tomorrow. also i should note that i have no problem seeing the nexus 7 in file explorer. i can move files without issue. Its only for adb that i cannot see it. i tried disabling mtp and going into fastboot mode but still no luck
thanks