$ man 5 xorg.cong
$ cat /etc/X11/xorg.conf
...
Section "ServerFlags"
Option "DontZap" "false"
EndSection
Put something like this in xorg.cong:
Section "ServerFlags"
# Disallows the use of the Ctrl+Alt+Keypad-Plus and Ctrl+Alt+Keypad-Minus.
Option "DontZoom" "true"
# Blank phase of the screensaver.
#Option "BlankTime" "0"
# Standby phase of DPMS mode.
Option "StandbyTime" "10"
#
#Option "SuspendTime" "0"
#
#Option "OffTime" "0"
EndSection
Time measure in minute.
To enable this configuration you must set "DPMS" option in "Monitor" section:
Section "Monitor"
...
Option "DPMS"
...
EndSection
To view current DPMS settings:
$ xset q
To disable DPMS for current session use command:
$ xset -dpms
To turn off monitor use:
$ sleep 1; xset dpms force off
See:
To see currect settings type:
$ xdpyinfo | grep dimensions: dimensions: 1280x1024 pixels (382x302 millimeters)
From this dimensions calculated your display dpi resolution:
$ xdpyinfo | grep resolution: resolution: 85x86 dots per inch
To set dimensions edit '/etc/X11/xorg.conf' (size in mm):
$ cat /etc/X11/xorg.conf ... Section "Monitor" ... DisplaySize width height ... EndSection
If you're using NVIDIA display drivers version 8756 or above and your monitor reports an EDID DPI value, you must tell the drivers to ignore this value as it takes precedence over all the above configuration options/arguments:
Section "Monitor" ... DisplaySize width height Option "UseEdidDpi" "false" ... EndSection