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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.

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

any idea?

share|improve this question

When adb shows devices as ???????????? it's usually a permission problem and the usb device file. Your udev rules doesn't seem right. Make sure that you have udev configured to something like this:

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

Where 04e8 is Samsung's USB Vendor ID.

Under Linux there is also an adb_usb.ini from the SDK where you have to add the vendor IDs:


# USE 'android update adb' TO GENERATE.
share|improve this answer
Oh that's funny, add vendor IDs when it says "DO NOT EDIT" :) – Bryan Denny Dec 29 '11 at 16:35
You can safely ignore this warning. Just manually add the vendor IDs. More on android update adb can be found here. – Flow Dec 29 '11 at 16:46
Wasn't saying that you are wrong, I just found that amusing :) But thanks for clarifying it – Bryan Denny Dec 29 '11 at 17:00
@Flow I just want know why when I switch off the tablet and connected to the USB its showing the number and online as status. adb devices List of devices attached 4641199B0F8488AE device – Padma Kumar Dec 30 '11 at 7:50

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