Quick Fixes for WiFi Disconnection on Ubuntu

Method 1: Disable WiFi Power Management

Ubuntu might automatically turn off WiFi to save power. Here’s how to stop that:

1. Check Your Network Interface Name: Use
   iwconfig
   to find your network interface name (it’s wlan0 for many but can differ).
2. Turn Off Power Management: Execute
   sudo iwconfig wlan0 power off
   , replacing wlan0 with your actual interface name.

Method 2: Edit NetworkManager Configuration

Prevent automatic disconnections by tweaking NetworkManager:

1. Open Configuration File: Run
   sudo vi /etc/NetworkManager/NetworkManager.conf.
2. Add Power Save Setting: Insert the following lines:
   [connection]
wifi.powersave = 2
3. Restart NetworkManager: Apply changes with
   sudo systemctl restart NetworkManager.

Encountered “Operation not supported”? If disabling power management directly doesn’t work, try this alternative:

Alternative Method: Use TLP for Advanced Power Management

TLP offers granular control over power settings, including WiFi:

1. Install TLP: Update your system and install TLP with
   sudo apt update
   followed by
   sudo apt install tlp tlp-rdw.
2. Start TLP: Activate TLP using
   sudo tlp start.
3. Edit TLP Configuration: Modify
   /etc/tlp.conf
   to disable WiFi power management. Uncomment (or add) the lines:
   WIFI_PWR_ON_AC=off
WIFI_PWR_ON_BAT=off
4. Restart TLP: Make your changes effective with
   sudo tlp start