Disabling Raspberry Pi 3 Wifi Power Save

gistfile1.txt

There are 3 ways of disabling power save on the Raspberry Pi 3 depending on how you wifi is configured:

1. Configured using NetworkManager

Follow this gist: https://gist.github.com/jcberthon/ea8cfe278998968ba7c5a95344bc8b55

2. Configured using Command Line editing `/etc/network/interface`

The accepted known method is to add the following line *AFTER* the setting up of the interface

`wireless-power off`

Some other tutorials suggest to add this instead:

`post-up iw wlan0 set power_save off`

e.g:

```
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
post-up iw wlan0 set power_save off
```

or 

```
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
wireless-power off
```

3. Configured using Pixel's GUI Wifi icon

I tried to add the lines used for method 2 as well as the following line in the `/etc/network/interfaces`, but this only resoulted in a error saying `/etc/network/interfaces:7: misplaced option` and `ifup: couldn't read interfaces file /etc/network/interfaces`. Therefore I decided to add it to `/etc/rc.local` which is source by root just after starting the session.

`iw wlan0 set power_save off`

Add that line *BEFORE* the `exit 0` line in `/etc/rc.local`

Thanks to https://raspberrypi.stackexchange.com/a/34952 for the first 2 methods.