===== How to add new screen resolution for Tinkerboard =====

Screen resolution for Tinkerboard can be changed in Settings>>Display configuration dialog.
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Default resolution list in the dialog does not include popular resolutions like 
  - 1280x800
  - 1368x768
  - 1600x900


Utility **CVT** can be used add new resolution modes to the list

1. Open console window (**konsole** icon)
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2. Type command
  cvt 1368 768  [Enter]
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The utility will print modesettings parameters that should be included in **modesettings** configuration

  operator@tinkerboard:~$ cvt 1368 768
  # 1368x768 59.88 Hz (CVT) hsync: 47.79 kHz; pclk: 85.25 MHz
  Modeline "1368x768_60.00"   85.25  1368 1440 1576 1784  768 771 781 798 -hsync +vsync
  operator@tinkerboard:~$ 

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3. Open for edit **modesettings** configuraion file "/etc/X11/xorg.conf.d/20-modesettings.conf" with administrator permissions (sudo)

  sudo  mcedit /etc/X11/xorg.conf.d/20-modesettings.conf
 
4. Add modesettings for 1368x768 resolution into "Monitor" Section. There can be several **Modeline** lines for different screen resolution you like to add. Add "PreferredMode" Option for resolution you like to have by default. Press **"F2"** button to save the changes.

<code bash 20-modesettings.conf>
  Section "Monitor".

    Identifier "HDMI-1".

    Modeline "1280x800_60.00"   83.50  1280 1352 1480 1680  800 803 809 831 -hsync +vsync
    Modeline "1368x768_60.00"   85.25  1368 1440 1576 1784  768 771 781 798 -hsync +vsync
    Modeline "1600x900_60.00"  118.25  1600 1696 1856 2112  900 903 908 934 -hsync +vsync

    Option "PreferredMode" "1368x768_60.00"

  EndSection
</code>  


                              
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5. Reboot the computer and check if new resolutions appear in the Display settings
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