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My Lenovo Ideapad G50-70 will automatically disconnect from the Internet at random moments on 14.04. The network will first just stop working without any warning, and after a while, it will disconnect by itself. The strange thing is, I can't manage to get the computer back online without restarting the whole computer; it will not be able to connect to the network at all. Simply turning wireless/networking off and back on doesn't help at all. I've tried following old instructions to update drivers (as shown here: http://ubuntuforums.org/showthread.php?t=2080326 ), but it didn't help.
lspci -nnk | grep -iA2 net:
~$ lspci -nnk | grep -iA2 net 01:00.0 Ethernet controller : Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10) Subsystem: Lenovo Device [17aa:380a] Kernel driver in use: r8168 02:00.0 Network controller : Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723] Subsystem: Lenovo Device [17aa:b736] Kernel driver in use: rtl8723be
It would be awesome if somebody could help me out! I really don't want to use Windows 8 instead. :/