I found this solution, and worked perfectly on a Lenovo g40-30 so i guess it should work in other lenovo pc...
quote: for one time test: sudo rmmod ideapad_laptop for working after reboot: echo "blacklist ideapad_laptop" | sudo tee -a /etc/modprobe.d /blacklist-ideapad.conf found it in: http://askubuntu.com/questions/507470/wifi-not-working-on- ubuntu-14-04-lenovo-g-50-30/535976#535976 prior to that I re-installed the module, updated the kernel to 3.16, and none of that worked. this piece of code did make the realtek run -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1320070 Title: Realtek Wifi card RTL8723BE drops connection with MSI enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1320070/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs