RPi 4 CEC-Client with LG TV, switch from TV tuner?

Question

So I have managed to control the LG TV (Simplink Enabled) with the cec-client library on the RPi 4.

The problem is when I turn the TV back on, it defaults to the TV tuner input.

There is no TV aerial connected and I have had a look through the LG TV's settings but could not find anyway to set the default input to HDMI.

• Simplink is enabled
• RPi is connected to HDMI1
• Connection is set as PC

Is there a way with the cec-client to tell the TV to use HDMI 1?

Answer 1

The "as" command sets the RPi to the active source, which tells the TV to use the port the RPi is on.

Give this a try:

Turn TV on:

echo "on 0" | cec-client RPI -s -d 1

Set active source:

echo "as" | cec-client RPI -s -d 1

For a particularly stubborn monitor I created the following "tvon.sh" script:

#!/bin/bash
echo "on 0" | /usr/bin/cec-client &
cecpid=$!
echo $cecpid
sleep 15s
kill $cecpid
echo "on 0" | /usr/bin/cec-client &
cecpid=$!
echo $cecpid
sleep 15s
kill $cecpid
echo "as" | /usr/bin/cec-client &
cecpid=$!
echo $cecpid
sleep 15s
kill $cecpid