Hi - this will be brief before I am logged off the internet again. I have a dual boot with Windows 7 which has no network problem. However with Ubuntu, I am logged off after about 7-8 minutes. The following may be of assistance.
Kindly ask for any further assistance.
geoff@ABC:~$ lspci -nnk | grep -iA2 net
03:00.0 Ethernet controller : Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 06)
Subsystem: Giga-byte Technology GA-EP45-DS5 Motherboard [1458:e000]
Kernel driver in use: r8169
Edit: I apologize profusely for supplying little information but I wasn't sure what was required. I may add that Internet connection was fine for 8 months when I was only using Ubuntu. It seems that the problem has only arisen after the dual boot made about 4 days ago. I really hope that some kind person can help me out.