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 Turn off Wireless LAN Adaptor to save power? 
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Joined: Thu Apr 04, 2013 9:23 pm
Posts: 6
Location: Christchurch, NZ
Post Turn off Wireless LAN Adaptor to save power?
We're using the low-power processor version of the Fit3PC with Linux Mint 13 for a small business server. The business is operating in an off-grid eco environment with daytime solar power and nighttime battery reserve with inverters.

We have everything working but since the Wireless LAN (WiFi) connectivity isn't required would like to turn off the Wireless adapter automatically at boot time to reduce power consumption even further.

Can you advise:

- what is the power saving achievable by turning off the Wireless Adapter hardware?

- what configuration changes do we make to turn off the adapter hardware (under Linux Mint 13 )?


Tue Jul 16, 2013 11:11 pm
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Joined: Thu Apr 04, 2013 9:23 pm
Posts: 6
Location: Christchurch, NZ
Post Re: Turn off Wireless LAN Adaptor to save power?
I have an answer for one of the questions that I raised - yet to be confirmed but certainly the wireless network doesn't auto connect to a network at boot time.

Reduce Power Consumption by Disabling WiFi Transmitter

Add a line to the /etc/modprobe.d/blacklist.conf file as follows:

blacklist rtl8192ce

This stops the driver loading which presumably doesn't allow the WiFi adapter's transmitter to be powered on.

Can someone please confirm that preventing loading of the Realtek wireless device driver module in Linux does in fact prevent its transmitter from ever turning ON?

I'd still be interested to know what the potential power saving should be. At present I don't have the equipment to measure it.


Wed Jul 17, 2013 1:25 am
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Joined: Thu Jun 02, 2011 1:13 pm
Posts: 1260
Post Re: Turn off Wireless LAN Adaptor to save power?
Quote:
Can someone please confirm that preventing loading of the Realtek wireless device driver module in Linux does in fact prevent its transmitter from ever turning ON?


Yes, it will keep the transmitter off, and will save power.

_________________
Gabriel Heifets

Fit-PC2/3/IntensePC support.


Tue Jul 30, 2013 10:20 am
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