Disabling network power save mode

[brianboru82]

The Raspberry Pi networking has a power save mode that is on by default, which can sometimes cause it to drop offline. In the latest version of the RPi OS, Bookworm, it uses the network manager nmcli for configuration.

First, open a terminal window, and type nmcli connection . This will list the network connections on the Pi. You will use the name of the connection from this list to disable power saving. In my case, with wi-fi, my connection name is 'preconfigured'.

Next, type nmcli c modify <connection name> 802-11-wireless.powersave x, entering the connection name from above. Substitute X for one of the values here:
Disable: 2 - NM actively disables power save
Enable: 3 - NM actively enables power save
Ignore: 1 - NM ignores power save settings
Default: 0 - NM uses the globally configured value (in NM)

(Derived from this thread: https://forums.raspberrypi.com/viewtopic.php?t=357629 )