Help Android Debug Bridge

[Lana30]

What could be the cause (and solutions please) of not seeing any devices listed when entering code adb devices when trying to unlock your phone?

 

[Hadron]

Problems with drivers, cable or USB port are all possible.

But to deal with the simplest first, are you sure USB debugging is enabled on the phone?

 

[DaddyDiggz]

Adb could not be setup properly. Has your device been recognized by Adb in the past?

 

[scary alien]

Also, make sure MTP is turned OFF (Settings -> Storage -> Menu (3 vertical dots in the upper right-hand corner) -> USB computer connection -> un-/de-select Media device (MTP)).

(My Nexus 5 will NOT connect to adb with MTP enabled)

You'll probably want to turn MTP back on later, after you've used USB debugging.

 

[DaddyDiggz]

ive never seen adb connect to anything while mtp was connected. just usb hard disk. (connected as a ha drive) and if adb/fastboot does not recognize the device, then more than likely adb is not setup properly. you can google "15 second adb setup and youll bebgood to go after you run theor peogram, shouldbe from xda. then open cmd then type adb devices and you should popup and he able to continue.

 

[DaddyDiggz]

Ty

 

[Hadron]

Also, make sure MTP is turned OFF (Settings -> Storage -> Menu (3 vertical dots in the upper right-hand corner) -> USB computer connection -> un-/de-select Media device (MTP)).

(My Nexus 5 will NOT connect to adb with MTP enabled)

You'll probably want to turn MTP back on later, after you've used USB debugging.

Interesting - my HTC doesn't even have that option (ADB works fine though).

 

[scary alien]

Here's Koush's universal adb drivers you could also try:

http://www.koushikdutta.com/post/universal-adb-driver
http://download.clockworkmod.com/test/UniversalAdbDriverSetup.msi​

 

[Lana30]

Thank you all for your answers! You guys are great! I will come back if I have any further questions.

 

[Lana30]

Hi,
If you are trying to unlock your android device with this method and after entering the second command you get something that says that the path was detected, could it be that the right drivers for the android device in question were not installed properly or the wrong ones were chosen? Thanks.

 

[El Presidente]

What device are you trying to unlock (I take it you want to unlock the bootloader)?

What command have you just issued?

 

[Hadron]

^This. The exact command and the exact message are a great help in debugging these things.

 

[iowabowtech]

If it's your first time using adb on this machine, you need to accept the authorization prompt on the phones screen following the first adb devices attempt. Check the box to "always allow" then accept. Then it will be easier to use hax tools which utilize adb in the background...if that's what's going on here. Some of your comments led me to believe that might be what's going on but not sure.

Screen shots and very specific descriptions of the issue(s) will get your answer quickly. The people who've already answered above are the who's who of adb troubleshooting. Help them help you.