Ubuntu – Lenovo Z50-70 realtek dirver RTL7823BE wi-fi does not connect


My Wi-Fi driver, I think, is not functioning properly on my Lenovo Z50-70 using a Ubuntu 14.04 OS.

After connecting to a wireless network it works for a brief period of time, then, although it shows a stable connection, I can't access any website whatsoever.

I tried the Wi-Fi on Windows 8.1 and it worked perfectly.

Any ideas guys?

Best Answer

I was able to fix this issue after lot of research and facing kernel panic issues. Here is how I fixed it.

Note This can be used for installing any realtek wireless driver

lspci | grep Network

Note: If in this process you get kernel panic issue. DONT PANIC Solution for it is at the end. You dont need to re-install Ubuntu.

  1. Upgrade linux kernel

  2. Install following

    sudo apt-get install git build-essential linux-headers-$(uname -r) linux-headers-generic
    git clone https://github.com/lwfinger/rtlwifi_new
    cd rtlwifi_new
    make clean
    sudo make install
    sudo depmod -a
    sudo modprobe rtl8723be
    echo "options rtl8723be fwlps=0" | sudo tee /etc/modprobe.d/rtl8723be.conf
  3. Reboot


Kernel panic If you run into kernel panic issue where the system does not reboot

  1. Reboot into recovery mode
  2. Log in with root
  3. Mount file system in read write mode

    mount -o rw,remount /
  4. Add the driver that you just added to the blacklist

    vim /etc/modprobe/blacklist.conf

    Add line blacklist rtl8723be

  5. Reboot