xorg.rst
author Oleksandr Gavenko <gavenkoa@gmail.com>
Fri, 25 Feb 2011 17:05:05 +0200
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Turn off monitor. Disable standby for current session.
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-*- mode: outline -*-
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* Where find info?
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  $ man 5 xorg.cong
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* Enable Ctrl+Alt+Backspace.
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  $ cat /etc/X11/xorg.conf
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Section "ServerFlags"
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        Option      "DontZap" "false"
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EndSection
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* How set standby time?
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Put something like this in xorg.cong:
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  Section "ServerFlags"
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      # Disallows the use of the Ctrl+Alt+Keypad-Plus and Ctrl+Alt+Keypad-Minus.
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      Option "DontZoom"       "true"
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      # Blank phase of the screensaver.
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      #Option "BlankTime"      "0"
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      # Standby phase of DPMS mode.
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      Option "StandbyTime"     "10"
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      #
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      #Option "SuspendTime"    "0"
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      #
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      #Option "OffTime"        "0"
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  EndSection
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Time measure in minute.
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To enable this configuration you must set "DPMS" option in "Monitor" section:
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  Section "Monitor"
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      Option "DPMS"
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...
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  EndSection
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To disable standby for current session use command:
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  $ xset -dpms
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To turn off monitor use:
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  $ xset dpms force off
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* Set display dimensions.
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To see currect settings type:
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  $ xdpyinfo | grep   dimensions:
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dimensions:    1280x1024 pixels (382x302 millimeters)
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From this dimensions calculated your display dpi resolution:
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  $ xdpyinfo | grep resolution:
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resolution:    85x86 dots per inch
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To set dimensions edit '/etc/X11/xorg.conf' (size in mm):
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  $ cat /etc/X11/xorg.conf
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Section "Monitor"
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  DisplaySize     width height
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EndSection
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**  Overriding EDID Settings for NVidia cards.
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If you're using NVIDIA display drivers version 8756 or above and your monitor
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reports an EDID DPI value, you must tell the drivers to ignore this value as
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it takes precedence over all the above configuration options/arguments:
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Section "Monitor"
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  DisplaySize     width height
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  Option         "UseEdidDpi"  "false"
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EndSection
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