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[Gianluca Cavalli <cavalligianluca@xxxxxxxxxx>]

A friend suggested me to follow this instructions. It worked:
1- download http://iseborn.eu/downloads/ubuntu_yoga_2_wifi/Makefile
2- download http://iseborn.eu/downloads/ubuntu_yoga_2_wifi/ideapad-laptop.c
4- open ideapad-laptop.c and change this line
DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"),
in
DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"),

3- go with a terminal where you downloaded the files and type "make" and
then "make install"

note: remove any previously workaround you did before (like the
blacklisting one).

So is there a way to include a patch for this models too?

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https://bugs.launchpad.net/bugs/1448008

Title:
  ideapad_laptop module disable wifi on Lenovo G50-30 (rtl8723be)

Status in linux-lts-utopic package in Ubuntu:
  New

Bug description:
  Description:	Ubuntu 14.04.2 LTS
  Release:	14.04
   The ideapad-Laptop module just breaks the wifi on my Lenovo G50-30 (Realtek network card: rtl8723be). The only way to get wifi working is by blacklisting ideapad_laptop. 

  As far as i know the bug affected other models too
  (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1324095) but the
  patch released didn't works on my model.

  PS: i tested the live version of Ubuntu 15.04, same results: wifi
  still not working due to the ideapad_laptop module.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-34-generic 3.16.0-34.47~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-34.47~14.04.1-generic 3.16.7-ckt8
  Uname: Linux 3.16.0-34-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.10
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Apr 24 11:39:00 2015
  InstallationDate: Installed on 2015-02-28 (54 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)

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