adb error (error: protocol fault (couldn't read status): Invalid argument)

Question

I am unable to connect to my phone using adb. I am getting the following error:

D:\softwares\Development\Android\android-sdk-windows\platform-tools>adb devices -l
List of devices attached
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
error: protocol fault (couldn't read status): Invalid argument

http://s18.postimg.org/7fdc8w9dl/screenshot_97.png

Previously i am getting this error in windows 8.1 then i have installed windows 10 and error resolved but now again i am unable to connect my cellphone with adb :(.

I am getting this error even if no device is connected.

Eclipse error:

[2015-10-24 13:25:02 - ddms] Failed to initialize Monitor Thread: Unable to establish loopback connection
[2015-10-24 13:25:02 - adb] error: protocol fault (couldn't read status): Invalid argument
[2015-10-24 13:25:02 - ddms] 'D:\softwares\Development\Android\android-sdk-windows\platform-tools\adb.exe,start-server' failed -- run manually if necessary

Update: Even adb tcp is also not working so i think this is not a driver issue.

ADB traces http://s24.postimg.org/mtfdwf3id/screenshot_99.png

Answer 1

See my answer here, for me adb port 5037 was in use, killing the process using the port resolve the issue.

Answer 2

In your task manager, find adb.exe > right click and End Process.

solved this way for me..

Answer 3

None of mentioned solutions work, seems like something wrong with windows, finally i ended up with resetting my windows 10 and issue resolved.

Answer 4

In my case:

adb kill-server
adb start-server

:)

Answer 5

Just Restart PC and everything mean Android Studio and your android Device its working for me

Answer 6

As you may found in source code of ADB, something raised up this error:

     if (!ReadFdExactly(fd, buf, 4)) {
         *error = perror_str("protocol fault (couldn't read status)");
         return false;
     }

Try to export export ADB_TRACE=all

And rerun adb devices

With this env variable you will see much more info

Answer 7

I was also getting this error so here's how I solved it. I killed the adb process and start again.

Steps:

1. Open the Task manager (Windows);
   • You can press Ctrl+Shift+Esc and task manager will be opened.
2. Find adb.exe and right click on it. Click the "End process" menu item;
3. Open a command prompt and type adb start-server and it will start the adb again.

Answer 8

Although not exactly the same error as the OP, I was getting a similar error in Windows:

❯ adb.exe start-server
error: protocol fault (couldn't read status): No error

This error was related to my port proxy. It seems I had setup some rules that resulted in the adb client/server not being able to communicate with each other.

I was able to solve this by resetting my portproxy settings:

netsh interface portproxy reset

And now I can start the adb server:

❯ adb.exe start-server
* daemon not running; starting now at tcp:5037
* daemon started successfully