thanks for the reply btw.
yes i have tried loopback test as instructed within this sub forum. So yes, i didnt even get the reply or echoed any data from the arduino. So i can conclude that the arduino board somehow "broken".
i have tried uploading via master-slave connection too but still not fix anything yet.
I think i use newest version of fedora and 1.8.5 version of arduino IDE. And i have no idea if my board is original or clone one but i attach the picture here.