I have a 5" display that runs entirely on the HDMI connection to the Pi, including power. Unfortunately, the display has a backlight which can't be switched off unless it is completely disconnected from power. Is there a way to shut off the power output to the HDMI port from the RPi OS?

I've tried commands like tvservice -o which was advised in other threads to shutoff HDMI displays. This indeed cuts the video feed to the HDMI output, but the power remains (apparently +5V on pin 18 is HDMI standard).


Per Milliways answer, there's no built in method for cutting power to the HDMI socket. You could, if you were feeling keen, try using an HDMI breakout board and either a relay or transistor connected to a GPIO pin to control the power to HDMI pin 18 on startup and shutdown.

  • You got me wondering if common HDMI switchers switch the power on the HDMI output.
    – linhartr22
    Jul 5 '16 at 18:04

No. The HDMI power is supplied via a RT9741CGV "High-Side Power Switch" and there seems to be no control.

Edit inserted by an anonymous author Per comments below, the relevant datasheet can currently be found on Github here


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