I tried most of the answers above, some of them worked but the problem started again after a couple of hours. Finally I installed a fresh Ubuntu and get rid of the disconnection syndrome but the same thing started to happen the day before yesterday.
I tried most of the answers above, some of them worked but the problem started again after a couple of hours. Finally I installed a fresh Ubuntu and get rid of the disconnection syndrome but the same thing started to happen the day before yesterday.