Samsung Tablet 7.0 plus and 7.7 unable to debug devices

Question

I have a problem of debugging samsung tablet device on my ubuntu. in My case I am using:

1. ubuntu 11.04
2. android-sdk tools version 17.0
3. android-sdk Platform-tools version 11.0
4. Samsung tablet 7.0 plus and 7.7 , android-os version is 3.2

when I connect my device to my ubuntu computer the command "adb devices" as show "??????????? device", then i cannot debug or install my application on the device. it was working for Samsung Tablet 8.9 and 10.1. I try to do something as below:

1. restart adb server (adb kill-server && adb start-server)
2. restart adb server as root (sudo adb kill-server && sudo adb start-server)
3. check udev and permission to be "a+rx" then restart udev and restart adb
4. stop adb (adb kill-server) start adb with usb mode (adb usb)
5. Add vendor id to ~/.android/adb_usb.ini

All of these solution is not work and I have notice that when the device is turn off and connected to my computer while is charge, the command "adb devices" is list as normal like "2E83E... device" and also the same as when I turn it on while device is in bootloader, after the device ready the command "adb devices" is show above which I cannot do anything with that device.

I wonder if there are any trick or something that I have to do with android-sdk or with my ubuntu to solve this problem.

Thanks you very much for adviser.

Thanks Veasna.

Answer 1

I recently had to debug an application running on GT-P6200 (that should be 7.0 Plus) and had the same kind of problem: it just won't show up in adb.

Every now and then it would, without me doing anything special. There are a lot of people complaining about that on the Internet and nobody has a working solution or a workaround.

I suspect it is some kind of a bug in Samsung firmware, and there is not much we can do about it until Samsung decides developers are important and fixes that problem.

(Perhaps that will happen if and when they release the ICS upgrade for that tablet.)