Wireless driver (QCA-9377) not working properly

[Chris]

Hello guys,

I have Lenovo Ideapad 500S-13ISK. It is bundled with Qualcomm Atheros QCA-9377 (rev 30) 802.11ac wireless card.
Currently I have running Ubuntu 16.10 with all security updates.

Wireless is dropping constantly. I tried different GNU/Linux distributions but the result is either same or worse. I assume is something related to NetworkManager and eventually Systemd.
The thing is that I loose signal at some point but the network manager indicates that I have connection. After toggling Airplane mode it manages to continue to work properly but I am loosing the list with wireless connections which are available to be. For some reason it starts to show that I am connected through cable, instead of wireless.

The only two ways to resolve constant drops in the signal I found is to toggle Airplane mode or restart NetworkManager. Both results to wrong indication and disables me from choosing another network.

➜ ~ lsb_release -rd
Description: Ubuntu 16.10
Release: 16.10

➜ ~ apt-cache policy network-manager
network-manager:
  Installed: 1.2.4-0ubuntu1
  Candidate: 1.2.4-0ubuntu1
  Version table:
 *** 1.2.4-0ubuntu1 500
        500 http://bg.archive.ubuntu.com/ubuntu yakkety/main amd64 Packages
        100 /var/lib/dpkg/status

[Jeremy (wa113y3s)]

Open a terminal and enter

sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

as one line, then reboot and see if your wifi is improved

[Borodin Nikolay (monsterovich)]

>sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

It doesn't work. Transmission speed is very poor even after that.