Author Topic: How to Disable HDMI on the Raspberry Pi  (Read 68 times)

0 Members and 0 Guests are viewing this topic.

Offline WB3IHY

  • Jr. Member
  • **
  • Posts: 74
  • Location: Northeast Philadelphia, Pennsylvania
  • Referrals: 0
    • QRZ Profile
How to Disable HDMI on the Raspberry Pi
« on: December 12, 2019, 03:10:16 pm »
For those of us who use Pi-Star on the Raspberry Pi, the HDMI port on the Pi board is basically of no use to us.  Yet on some models/configurations, the port remains active, drawing a little bit of power and generating a little bit of heat, even with nothing connected to it!

Luckily, there is a way to disable that port if you want (and how to reactivate it later on if you need it).

First, determine see of your version of Pi-Star has the code installed that you need.  SSH into Pi-Star and enter

which tvservice

If you get a response like "/usr/bin/tvservice" then you've got the code.  If you get nothing in response, then you need to install it by putting your Pi into RW mode with

rpi-rw

And then install the code with the command

sudo apt-get install libraspberrypi-bin

Now you can control the HDMI port and see what state it's in. The commands are:

What's the current status of the port?
tvservice -s

Turn the port off:
tvservice -o (that's a lowercase "o," not a zero!)

Turn the port on:
tvservice -p

Note that some editions of Pi-Star version 4 automatically "ship" with the port disabled.  So, if you find that it's off when you first test it...congratulations, there's nothing more to do.

If you do find that it's on and want to make sure it stays off after a reboot, you'll need to edit a file to make it "stick." So, enter the following command:

sudo nano /etc/rc.local

And add the following code to the end of the file:

# Turn off HDMI
/usr/bin/tvservice -o

Write the file, exit Nano, and voila: Enjoy a little bit of power saving and slightly less heat from your Pi.

73,
Joe, WB3IHY

Share on Facebook Share on Twitter


 

Related Topics

  Subject / Started by Replies Last post
7 Replies
113 Views
Last post December 11, 2018, 09:32:09 pm
by Robert K4WZV
0 Replies
128 Views
Last post May 10, 2019, 01:12:50 pm
by k5gu
1 Replies
177 Views
Last post May 17, 2019, 10:33:04 pm
by N1KK
2 Replies
151 Views
Last post May 27, 2019, 09:19:49 pm
by N1KK
3 Replies
217 Views
Last post February 02, 2020, 11:53:51 am
by N1KK