Fix Slow Internet Speed on Ubuntu 22.04 (Ethernet & Wi-Fi Guide)

Fixing Wi-Fi

Fixing Wi-Fi Slow Speed

5. 5. Identify Wi-Fi Interface

   First, find your Wi-Fi Device ID:

   iw dev

   Look for the line beginning with Interface, for example: wlp2s0

6. 6. Disable Wi-Fi Power Saving

   To avoid performance drops, disable Wi-Fi Power Management:

   sudo iw dev [DEVICEID] set power_save off

   Example:

   sudo iw dev wlp2s0 set power_save off

   To make it permanent:

   sudo bash -c 'echo "ACTION==\"add\", SUBSYSTEM==\"net\", KERNEL==\"wlp*\", RUN+=\"/usr/bin/iw dev %k set power_save off\"" > /etc/udev/rules.d/70-wifi-powersave.rules'

7. 7. Check Wi-Fi Bitrate

   Verify your Wi-Fi Bitrate:

   iwconfig

   Look for Bit Rate= value.
   If it’s low (e.g. 54 Mb/s), you might have interference or wrong band.

8. 8. Restart and Reassociate Wi-Fi

   Reset and reconnect your wireless interface:

   sudo nmcli device disconnect [DEVICEID] && sudo nmcli device connect [DEVICEID]

   Example:

   sudo nmcli device disconnect wlp2s0 && sudo nmcli device connect wlp2s0

9. 9. Force 5GHz Band (if Supported)

   To avoid 2.4GHz interference, prefer 5GHz Band:

   nm-connection-editor

   Then navigate to Wi-Fi → Band → A (5GHz) and Save.

10. 10. Update Wi-Fi Firmware and Drivers

    Finally, update Wi-Fi Firmware and Drivers:

    sudo apt update && sudo apt install --reinstall linux-firmware

    sudo ubuntu-drivers autoinstall

    Then reboot:

    sudo reboot

Summary: Disable Wi-Fi power saving, prefer 5GHz, update drivers, and check bitrate to fix most speed issues.