NEC MPI4E Raspberry Pi Compute Module Setup Guide

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7.15 To find a file by name

From Raspberry Pi OS use:

find / -name example.txt

7.16 To edit a protected system configuration file from the Raspberry

Pi OS desktop

From a terminal window open the Mousepad editor as sudo:

sudo mousepad

The file can now be opened, edited, and saved.

7.17 To prevent the screen saver from blanking the screen after

several minutes

From the Raspberry Pi OS edit the following file as sudo: /etc/lightdm/lightdm.conf

Modify the following section to add the highlighted text:

[SeatDefaults]

xserver-command=X -s 0 –dpms

7.18 Monitoring the system processes, CPU usage, and memory

The htop system tool is an interactive system-monitor process-viewer and process-manager that gives

visual information about processor, swap and memory status. Run from the command or terminal window:

htop

7.19 To enable and disable video output from the Compute Module to

the display

The internal HDMI video signal from the Compute Module to the display can be disabled and enabled

using the following commands. This can be useful for example to cause the display to enter standby

mode or switch to another video input via the loss of video from the Compute Module, depending on the

display settings.

To disable (turn off) the HDMI video signal output:

vcgencmd display_power 0

To enable (turn on) the HDMI video signal output:

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NEC MPI4E RaspberryPi 4 System on a Chip Solution