How to Disable the Blank Screen on Raspberry Pi (Raspbian)

rpi_blank_screen.txt

1 – Disabling the blank screen once
You can disable the blank screen once with the following command line instructions:

$ sudo xset s off
$ sudo xset -dpms
$ sudo xset s noblank
 
xset s off disable the screen saver, xset -dpms disables the DPMS (Display Power Management Signaling) and xset s noblank tells to X server to not blank the video device.

2 – Disabling the blank screen forever
If you want to disable the blank screen at every startup, just update the /etc/lightdm/lightdm.conf file and add in the [SeatDefaults] section the following command:

[SeatDefaults]
xserver-command=X -s 0 -dpms
 
You need root rights to update the lightdm.conf file. You can use the nano editor:

$ sudo nano /etc/lightdm/lightdm.conf