Android device does not show up in adb list [close

Question

I have a HP Slate 21 that is connected to my Windows box using a USB cable. USB debugging is enabled on the device. After adding the proper %SingleAdbInterface% and %CompositeAdbInterface% entries to the android_winusb.inf file, I now see "Android ADB Interface" in my Device Manager. However, running adb devices at the command-line does not show the device.

I have another HP slate 7 that shows up just fine under adb devices.

The only difference I see from Device Manager is that the one that works is named "Android Composite ADB Interface" and the other one is named "Android ADB Interface."

There is yet another subtle difference. In the winusb.inf file, for Slate 7 I have two %CompositeAdbInterface% entries defined but for Slate 21, there is just one %CompositeAdbInterface% entry defined.

What could be wrong with my setup?

Answer 1

Remove battery from phone, wait 10s, re-add it and try it again (alongside developer options etc.. in other questions)

I tried all other answers, but that was required in addition to the other suggestions for me.

Answer 2

I was having same problem in my ubuntu. When I run command adb devices it shows me ?????????? No permission.

Then I tried with adb kill-server and then sudo su and adb devices. No need to run command adb start-server devices command will start it automatically if it is not already started.

Hope this will save once one's minutes.

Answer 3

I had a similar issue and solved with the following steps after connecting the device via USB:

1. turn on developer options on the android device.
2. enable check box for stay awake.
3. enable check box for USB debugging.
4. open cmd
5. got to platform tools like D:\adt-bundle-windows-x86_64-20140702\adt-bundle-windows-x86_64-20140702\sdk\platform-tools.
6. adb kill-server
7. adb start-server
8. adb devices

Now we can see attached devices.

Answer 4

On Android 7.1 Nougat (in my case, a Moto G), manually re-enabling USB debugging on Developer Options did the trick:

Settings > Developer Options > USB debugging

PS C:\> adb devices
List of devices attached
myDeviceNumber      device

Answer 5

In Galaxy s6 - I resolved it by: Settings -> About device -> Software info -> Build number - tap it 7 times to enable Developer options. Go back to Settings -> Developer options -> turn on USB debugging.

Go back to your terminal adb devices and you should see the connected device. Hope that helps.

Answer 6

Click on Attach Debuger to Android Process and Click On Restart ADB.