USB Debugging not working, adb ignores Nexus 7

android eclipse debugging nexus-7
Bryan Gentry picture Bryan Gentry · Jan 22, 2014 · Viewed 53.9k times · Source

For several weeks, I was able to connect my Nexus 7 2 to my computer running Windows 7, and Eclipse would recognize it, allowing me to run apps on it. The device also showed up when I ran the adb devices command. Every time I plugged the Nexus 7 into the computer, the tablet asked if I wanted to allow USB debugging at that time. (Oddly, it never asked me whether I wanted to always allow it from that computer, but I didn't care.)

I recently updated the tablet to Android 4.4.2. I also updated the Android SDKs through the Android SDK manager. Now, when I plug the tablet in, I do not get prompt about USB debugging on the tablet, and neither Eclipse nor adb can see that it is there.

Here is a list of things I tried to do, gathering ideas from various forums around the web.

  • Re-download the Asus drivers for the Nexus 7 and update the driver. However, Windows does not even recognize this as the right drivers for this device.
  • Turn USB Debugging off and on on the tablet, and also revoke all USB debugging permissions.
  • Change the connection mode from media device to camera
  • Switch the runtime from Dalvik to ART
  • Type adb kill-server followed by adb start-server in the command line
  • Delete eclipse and all the Android SDK and download them all over again

None of this worked. Any other ideas on what to try?

Answer

Bryan Gentry picture Bryan Gentry · Jan 23, 2014

It turns out that the Nexus 7 definitely needs the Google USB Driver. Finding, downloading, and installing this driver worked perfectly.

Because Google's Android OEM drivers page does not include the Nexus 7 in its list of devices that need the Google USB driver, I had been trying the driver from Asus, which did not work. I did not try the Google USB driver because for some reason my SDK manager said it had downloaded the driver, but the driver was not to be found.

Finally I found I could download the Google USB driver from this page, which clarifies that all Google Nexus devices need this driver. Now I have successfully re-connected the tablet to ADB.

I submitted a documentation bug report to Google here in hopes that the OEM drivers page can be updated to reflect that all Google Nexus devices need the Google USB driver.

Related questions

How to resolve "Waiting for Debugger" message?

I have HTC Comet connected to Eclipse with SDK 2.2. I do a debug build - the application does not run; though it does get installed on the device. On the device I get this message box on the Comet screen …

Read More
Eclipse Android: Could not open Selected VM debug port (8700)

Possible Duplicate: Could not open Selected VM debug port (8700) I am getting this error on the console when opening Eclipse: "Could not open Selected VM debug port (8700). Make sure you do not have >another instance of DDMS or of …

Read More
How to stop debugging in Android application in Eclipse

I'm writing a simple Android application. I changed the "Java EE" perspective to "debug" and after tracing variables, I return to original perspective ( "Java EE" ) and stopped debugging. But when I try to run my application on my phone, it …

Read More