How to install ConnMan
Switching from Network Manager to ConnMan:
This is a general guide to replacing Network Manager with ConnMan. This guide explains how to setup a WiFi connection with ConMan. ConnMan can of course also be used with a LAN connection, but is more widely used with WiFi.
Start the process by installing ConnMan alongside NetworkManager.
If you require Bluetooth and VPN functionality make sure you have bluez and openvpn installed as well.
sudo pacman -S connman
There are various GUI frontends for ConnMan. The one I recommend is cmst (see the ConnMan Archwiki link for other GUI alternatives).
sudo pacman -S cmst
Enable/Start ConnMan and temporarily shutdown Network Manager with these commands:
sudo systemctl enable connman.service sudo systemctl start connman.service sudo systemctl stop NetworkManager sudo systemctl daemon-reload cmst &
Once you have started cmst you will need to change various cmst settings to enable your WiFi connection. CMST is very different than Network Manager, so it may take you a bit to figure out how to get your connection set up properly. The following recommendations are only my own personal cmst setting preferences. Your WiFi connection may require different settings to connect properly.
Ensure you have the cmst tray icon set to be "Shown" in your systray option settings.
Then, right click on the cmst system tray icon:
Select "Technologies", and then deselect "Wired" and ensure WiFi is selected on the menu.
Then, open the cmst control panel by left clicking on the cmst tray icon.
In the cmst Status tab:
Be sure your Wifi's "Power" button is in the On position.
Under your Wifi's "ID:Password" field you need to press the ID:Pass button and then enter your Wifi password.
In the cmst Wireless tab:
Click on your prefered connection's name from the list of those available.
Then click on the Connect button.
In the cmst Preferences tab, enable the following settings:
Use Start Options ---> Start Minimized
Enable ToolTips (Interface)
Enable System Tray Popups
Retry Failed Connection
Hopefully you are now connected and you may now close the cmst configuration page.
Once you have connman and cmst installed and working properly you can disable Network Manager in a more permanent manner.
Mask (completely disable) Network Manager:
sudo systemctl mask NetworkManager.service
Mask (completely disable) Network Manager dispatcher:
sudo systemctl mask NetworkManager-dispatcher
If you have the NetworkManager-wait-online.service enabled, then mask it as well:
sudo systemctl mask NetworkManager-wait-online.service
Restart your computer after making changes to the services.
If you want to switch back to Network Manager again in the future the changes are easily reversible. Running any of the above commands you used again with "unmask" instead of "mask" will re-enable the NetworkManager services. Then simply disable or uninstall connman and cmst and your system should be returned to its original state.
For more in depth information on Connman refer to the Archwiki: