How to turn screen on/off - Anthias on Pi OS bookworm

[qbicdesign]

To turn the screen off/on - Anthias on Pi OS bookworm
Firstly:
sudo nano /boot/firmware/config.txt
Find the line:
dtoverlay=vc4-kms-v3d
change it to:
dtoverlay=vc4-fkms-v3d

Now you can set a cron job (for example turn off screens mon-fri 6pm, turn on mon-fri 8am):

crontab -e

00 8 * * 1-5 /usr/bin/vcgencmd display_power 1
00 18 * * 1-5 /usr/bin/vcgencmd display_power 0

[nicomiguelino]

@qbicdesign, changing the value of dtoverlay to vc4-fkms-v3d will affect video playback, but thanks for sharing!

[qbicdesign]

Can you explain a bit further? I just tested it and video playback seems to be unaffected for me on Pi 3 model B.
In what way could it be affected?

[nicomiguelino]

Thanks for that info. On some Pi 4 devices, the video playback is not smooth, with noticeable flickering.