How to disable wifi power save to prevent disconnects

@Petrakis wrote:

I saw some posts about how weak the wifi is, and indeed it is… It kept losing signal and closing my ssh so I decided to try an old trick of mine. (Which happens to be an issue in all the Single Board Computers i have tried)

Since I disabled the chipset power saving mode I haven´t had disconnects, so It might be useful to you.

iw wlan0 set power_save off

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Edit: I have to add that not only doesn´t disconnect anymore but it increased the speed of transfering files too.

Note:
This is not permanent, on reboot it gets restored to “on”

Edit: July 28, 2018

How to set it on boot.

To set it to off on boot you need to create the following scrip in:

/etc/network/if-up.d/powesave_off

#! /bin/sh

set -e

# Don't bother for loopback
if [ "$IFACE" = lo ]; then
        exit 0
fi

# Only run from ifup.
if [ "$MODE" != start ]; then
        exit 0
fi

# Only do it once (skip for inet6).
if [ "$ADDRFAM" != inet ]; then
        exit 0
fi

/sbin/iw dev wlan0 set power_save off

exit 0

And don´t forget to set exec permissions:

chmod +x /etc/network/if-up.d/powersave_off (or whatever name you put to it)

I found the solution here: https://github.com/fordsfords/wlan_pwr

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