Disable HDMI on Volumio 2

Hi there,
I tried to turn off the HDMI on Volumio 2 using /opt/vc/bin/tvservice -o but encountered [E] Failed to initialize VCHI (ret=-1).

Any advice on how to get this done?

Ed

PI?

Yes RPi3. Sorry for missing that out.

Sent from my SM-G935F using Tapatalk

Just encountered the same. Solution is sudo.

sudo /opt/vc/bin/tvservice -o

What’s the advantage of turning off HDMI?

Supposed to save power:
jeffgeerling.com/blogs/jeff … rve-energy

Is this persistent, ie. will the service remain off after a reboot?
[edit]I have found the answer: If you’re running a headless Raspberry Pi, there’s no need to power the display circuitry, and you can save a little power by running /usr/bin/tvservice -o (-p to re-enable). Add the line to /etc/rc.local to disable HDMI on boot.[/edit]

monitor=none in kernel settings?