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I have a computer using Ubuntu 14.04 LTS with the ASUS Nvidia gt440 graphics card and a vga monitor that is supported with the resolution of 1280 X 800.

However, in the display options I could not find 1280 X 800 and all the other options are either causing screen to flicker or just lower resolution.

Is there a way to add a custom resolution in the display settings?

Bicycle 808
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peace123
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  • Identify your video card and what driver you are using. If xrandr does not work file a bug report. – Panther Nov 20 '15 at 01:05
  • xrandr gave an error adding new modeline. I had to change graphics cards. thanks for your reply. – peace123 Nov 20 '15 at 02:20
  • Please [edit] your question and add output of lspci -k | grep -EA2 'VGA|3D' terminal command. – Pilot6 Nov 20 '15 at 09:49

1 Answers1

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You can use xrandr:

The commands to be executed in order (Using 1280 x 800 as your desired resolution):

cvt 1280 800
xrandr --newmode "1280x800_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync

The part of the line after xrandr --newmode is similar to the ouput you should get when using the cvt command, so copy the output from the "resolution_refreshRate" ("1280x800_60.00" here) point to the +vsync point and add it to xrandr --newmode.

Then:

xrandr --addmode LVDS1 resolution_refreshRate (don't use speechmarks)
xrandr --output LVDS1 --mode resolution_refreshRate

If you want to make the changes permanent:

  • Create a bash script, xrandr.sh for example, and place your xrandr commands into it: 

    #!/bin/bash
sudo xrandr --newmode ""1280x800_60.00"" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
sudo xrandr --addmode LVDS1 1280x800_60.00
xrandr --output LVDS1 --mode 1280x800_60.00

  • Make the script executable with chmod +x xrandr.sh

  • Search for "Startup Applications" in the dash, run it, and add the script as a startup application.

The commands will now run every time you log into your account.

Note: I'm using LVDS1 as the supposed monitor name, but yours probably won't be the same. You can find your monitor name using:

xrandr | grep " connected " | awk '{ print$1 }'
TellMeWhy
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