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.