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WiFi randomly disconnected on Ubuntu 18.04 LTS

 I was having the same issue with bionic. First, I thought it was related to Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter, but even after updating it the signal continued to fluctuate.

It appears to be related to the gnome's network manager. After switching to WICD, the wi-fi hasn't been unstable anymore (that was almost 4 months ago). [EDIT: Still no issues as of today 05/28/2019] Here are a few steps to apply this fix:

Open up a Terminal and execute the following commands:

First, install WICD:

 sudo apt install wicd-gtk

Next, we uninstall NetworkManager:

sudo apt remove network-manager-gnome network-manager

After everything is confirmed to be working (best to check this after rebooting), you can remove config files for NetworkManager:

sudo dpkg --purge network-manager-gnome network-manager

(source https://help.ubuntu.com/community/WICD )


https://askubuntu.com/questions/1030653/wifi-randomly-disconnected-on-ubuntu-18-04-lts

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