I installed Ubuntu 14.04 on my new Lenovo G50-70. The wifi works perfectly in windows, however it behaves strangely on Ubuntu. It is slow, doesn't load heavier sites at all, and after a while, completely drops.After some research I discovered: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1320070sudo rmmod rtl8723be && sudo modprobe rtl8723be does not change anything, the wifi remains gone.The first thing I tried was sudo make install the driver from this repo: https://github.com/lwfinger/rtlwifi_new. Unfortunately nothing changed.Next I tried to disable the sleep feature:echo options rtl8723be fwlps=0 | sudo tee /etc/modprobe.d/rtl8723be.conf, without any luck.I then tried:sudo rmmod -v ideapad_laptopBut removing that module did not help either.Here is some environment info:uname -aLinux zirconcode 3.13.0-40-generic #69-Ubuntu SMP Thu Nov 13 17:53:56 UTC 2014 x86_64 x86_64 x86_64 GNU/Linuxlsusb | grep ReaBus 002 Device 006: ID 0bda:b728 Realtek Semiconductor Corp. Bus 002 Device 004: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controllerlsmod | grep rtlrtl8723be             139336  0 btcoexist             183378  1 rtl8723bertl_pci                39740  1 rtl8723bertlwifi               121008  3 btcoexist,rtl_pci,rtl8723bemac80211              626557  3 rtl_pci,rtlwifi,rtl8723becfg80211              484040  2 mac80211,rtlwifiI am stuck as none of the solutions seem to work. Any ideas would be much appreciated.
rtl8723be Realtek Wifi-Card driver not working on Ubuntu 14.04
ubuntu;wifi;drivers;kernel modules;realtek
Upgrading my kernel from 3.13 to 3.16 (http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.16-utopic/) and reinstalling the new driver from https://github.com/lwfinger/rtlwifi_new seems to have solved my problems. Don't forget to reboot.Note: Upgrading the kernel in itself did not help.