Samsung Galaxy 7" (GT-P6210) not detecting for USB debugging?

Question

I am using ubuntu Linux 10.04 Pc in that my Samsung Galaxy 7" (GT-P6210) homeycomb 3.2 is not detecting for development its showing in eclipse as

DeviceMonitor] Failed to start monitoring ???????????? in console

and in device tab its showing ?????????????.

Except this 7' GT-P6210 Samsung tablet all other Samsung devices are showing fine.

When I switch off the tablet and connected to the USB its showing the number and online as status. List of devices attached 4641199B0F8488AE device

why? whats the problem any solution.

NOTE: I already Added 51-android.rules

Samsung 04E8 

and also I enabled the USB debugging mode.

Its working fine in Mac.

EDIT: I got the product id thru $ lsusb command

Bus 001 Device 010: ID 04e8:6860 Samsung Electronics Co., Ltd 

I added product id in my rules.d file also

SUBSYSTEM=="usb", ATTRS{idVendor}=="04E8", ATTRS{idProduct}=="6860", MODE="0666", GROUP="plugdev"

after that I restarted udev

padmakumar@padmakumar-desktop:~$ sudo restart udev

then I tried

   padmakumar@padmakumar-desktop:~$ adb kill-server
    padmakumar@padmakumar-desktop:~$ adb start-server
    * daemon not running. starting it now on port 5037 *
    * daemon started successfully *
    padmakumar@padmakumar-desktop:~$ adb devices
    List of devices attached 
    ?    ???????????    offline 

//no luck so far

I found that its not detecting in updated ADT r16 and r15, except all other ADT version device is detecting very fine.

and also when device is in switch off mode its showing

name 464119990CEDAB9E, status as online and the OS version 3.2 in eclipse device tab. and in terminal also as below.

padmakumar@padmakumar-desktop:~$ adb devices
List of devices attached 
464119990CEDAB9E    device

any idea. Much appreciated :-)?

Answer 1

If, when you run adb devices, you see ???????????? in the list of devices, try stopping (adb kill-server) and restarting (adb start-server) the adb daemon.

Note that Samsung 04E8 is not a valid entry in 51-android.rules for udev. The correct line is:

SUBSYSTEM=="usb", SYSFS{idVendor}=="04e8", MODE="0666"

Also, make sure that you update the udev daemon after making this rules file change (sudo restart udev).

Answer 2

I'm having the same problem. Strangely, I can sometimes get the device to list correctly, but other times, it just won't work. Restarting my Linux laptop resolves the issue. What a pain!!

Today, I discovered that if I suspend my laptop, then turn it back on, it detects the device correctly again! That really beats restarting the OS.

Answer 3

Just stop and start adb server as root. Permissions issue will go away. Also udev step can be skipped.

Answer 4

Try this way, 1.Close Eclipse (IDE) first. 2.Execute this command on terminal " adb kill-server" 3.Now connect device to system wait, 10-20 seconds. 4.Execute this command on terminal " adb start-server", Check device status with "adb devices " command. 5 .Now open eclipse.