blog.crox.net (Entries tagged as raspberry pi)

Disable WiFi Power Management on Raspbian 12 (Network Manager)

nospam@example.com (crox) — Fri, 15 Aug 2025 22:48:00 +0000

8 years later there are still issues on Raspberry Pi / Raspbian with WiFi power management causing disconnects and generally bad performance.

I've found a reliable method to disable WiFi Power Management for the on-board WiFi chip (brcmfmac) here: NetworkManager WiFi Power Saving.

How to solve Edimax EW-7612UAn v2 (7392:7822) power management issues on Raspberry Pi (Raspbian WiFi disconnect)

nospam@example.com (crox) — Sun, 12 Nov 2017 19:04:00 +0000

On Raspbian, you don't need to install the 8192cu driver manually, as it comes with the distribution

To avoid disconnection issues, you need however to disable power management. This needs to be done in two places. First, this is what I have in /etc/modprobe.d/8192cu.conf:
```
options 8192cu rtw_power_mgnt=0 rtw_enusbss=0
```

This alone did not prevent the issue. I also had to add this entry to /etc/network/interfaces:

auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
wireless-power off
iface default inet dhcp

Sources: https://github.com/xbianonpi/xbian/issues/217, https://www.kuerbis.org/2016/03/raspberry-pi-3-kurztipps-wlan-sleep-mode-verhindern/

OSMC NFS mount

nospam@example.com (crox) — Sun, 02 Aug 2015 14:19:46 +0000

It looks like you need some systemd "magic" to successfully mount an NFS share on OSMC. Adding "x-systemd.automount,noauto" to the mount options in /etc/fstab did the trick for me.

Enable IPv6 on OSMC (wired and wireless)

nospam@example.com (crox) — Sat, 01 Aug 2015 22:14:00 +0000

Despite having read the opposite, it looks like IPv6 is disabled by default on the latest OSMC release (2015.06-1). I've tried adding a sysctl.d file to set /proc/sys/net/ipv6/conf/eth0/disable_ipv6 to 0, but this did not help. It worked only when I ran the command manually. By going through numerous forum posts I eventually found out that you need to use the connmanctl CLI tool:

root@osmc:~# connmanctl
connmanctl> services
*AO Wired                ethernet_b827ebaabbcc_cable
connmanctl> config ethernet_b827ebaabbcc_cable --ipv6 auto preferred
connmanctl> quit
root@osmc:~#

This enables IPv6 with autoconfiguration, turns on Privacy Extensions and prefers these ephemeral addresses over the autoconfigured ones.

The same command works for wireless as well, you just need to select the appropriate interface (the service name will start with wifi_).

"help" will display basic usage info.

If for some reason you would like to disable IPv6, the command would be "config ... --ipv6 off".

Using a Raspberry Pi running raspbmc to sync Fitbit One with galileo (fitbit linux sync)

nospam@example.com (crox) — Sat, 05 Apr 2014 11:47:47 +0000

(it should work with any other Debian-based Raspberry Pi distribution and all newer Fitbit devices that use BLE)

sudo -i
apt-get update
apt-get install python-pip
pip install galileo
galileo

You can then use cron or a simple shell script to periodically run galileo.

raspbmc - getting rid of iptables

nospam@example.com (crox) — Thu, 04 Apr 2013 20:39:00 +0000

I don't need a firewall on my Raspberry PI which runs XMBC (raspbmc distribution) - it's in a dedicated subnet behind a firewall. Furthermore, there are several reports of iptables having an impact on the performance of network playback, causing buffering issues (although I didn't do any benchmark myself).

I modified /etc/network/if-up.d/secure-rmc by adding "exit 0" right at the beginning like this:

#!/bin/bash

exit 0

dec_to_bin() {
...

And then I ran:

apt-get remove iptables

This was followed by a reboot.

nb: the secure-rmc file appears to be a raspbmc addition, and it could probably just be deleted instead.