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Tamim Addari
Asked: 2014-04-04 05:21:08 +0800 CST

How to lower the resolution of a laptop monitor?

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I am using laptop dell inspiron 5421. Now with an accident the 1/3rd of my left side screen is damaged. Now I was wondering is there any way so that I could shrink the screen size to other 2/3rd of my laptop?

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1 Answers

  1. It is possible by using xrandr util

    First execute xrandr

    $ xrandr

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 282mm x 165mm
   1920x1080      60.0*+   59.9     40.0  
   1680x1050      60.0     59.9  
   1600x1024      60.2  
   1400x1050      60.0  
   1280x1024      60.0  
   1440x900       59.9  
   1280x960       60.0  
   1360x768       59.8     60.0  
   1152x864       60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9

    You will see current resolutions.

    You need to add another one, that will cut some pixels from both sides of your display.

    For example: I'm using 1920x1080, 1920 is vertical resolution. If I want to cut 200 pixels (100 from both sides) I should add 1720x1080.

    Adding this new resolution:

    $ cvt 1720 1080 60
# 1720x1080 59.98 Hz (CVT) hsync: 67.18 kHz; pclk: 154.25 MHz
Modeline "1720x1080_60.00"  154.25  1720 1832 2008 2296  1080 1083 1093 1120 -hsync +vsync

    Now copy output starting from word "Modeline", and run this:

    xrandr --newmode "1720x1080_60.00"  154.25  1720 1832 2008 2296  1080 1083 1093 1120 -hsync +vsync

    Now run xrandr command, and look at the seconds line:

    eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 282mm x 165mm

    eDP1 is the name of connected output. Enter it to the next command

    xrandr --addmode eDP1 "1720x1080_60.00"

    Now run xrandr to check that new resolution successfully added.

    $ xrandr

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 282mm x 165mm
   1920x1080      60.0*+   59.9     40.0  
   1680x1050      60.0     59.9  
   1600x1024      60.2  
   1400x1050      60.0  
   1280x1024      60.0  
   1440x900       59.9  
   1280x960       60.0  
   1360x768       59.8     60.0  
   1152x864       60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
   1720x1080_60.00   59.7

    Now run arandr command.

    enter image description here

    Do right click on your output, in my case it is eDP1, then Resolution, and pick your new resolution. It should do what you want.

    Everything was taken from Ubuntu Wiki, please read it if you have any doubts.

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