I am on ubuntu 14 and installed it recently. I configured hibernate by creating a swap partition and can do hibernate. The problem is that after hibernate(prolonged suspend), laptop is very slow. The login page stays frozen for at least 5-10 minutes before I can enter password. After that I see that wifi/networking is disabled. It does not work until I restart network manager. Even after that system is very slow and takes around 20-30 minutes to become better but it never recovers fully.I have been searching for answers for more than 2 weeks but can not find proper lead.