GizmoEV
Posts: 4
Joined: Fri Jan 25, 2019 3:14 am
Location: Kelso, WA USA

Re: rpi-backlight: Control over display brightness and power

Sun Jan 27, 2019 10:15 pm

Maybe try recompiling and installing again. I didn't have any issues when I modified the C code to add a default value. I'm assuming it just over writes the existing program. Remember to make sure the permissions are set right.

lydon
Posts: 1
Joined: Fri Aug 09, 2019 2:02 pm

Re: rpi-backlight: Control over display brightness and power

Fri Aug 09, 2019 2:11 pm

I've stumbled accross the same issue. However, I'm using a non official 7inch screen which does not support backlight. Infact the driver for rpi_backlight is not installed.

For me I've simply wanted to turn on and off the screen while disabling HDMI output at a specific time by executing a script via cronjob.

Turn On

Code: Select all

/opt/vc/bin/tvservice -p
sudo echo "1-1" | sudo tee /sys/bus/usb/drivers/usb/bind)
Turn Off

Code: Select all

/opt/vc/bin/tvservice -o
sudo echo "1-1" | sudo tee /sys/bus/usb/drivers/usb/unbind)

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