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I recently let my 12.04 Ubuntu HTPC upgrade to 14.04 after doing so, the resolution my system's oboard ATI Radeon card will only display is 1400 X 900 to a 55inch Video 1080P display, when I was running 12.04 there were no issues with this set up at 1080P.

The system see's the ATI board, and is using the open source drivers. When I plug in a 17inch monitor I regain the ability to change the display resolution to different settings.

How can I force the resolution back to 1080P thanks

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  • Please edit with output 'xrandr'
    – DnrDevil
    Oct 17, 2015 at 10:57

1 Answer 1

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The easiest thing to do is add that resolution using xrandr - this is a good guide. You would then need to add the xrandr configurations to a startup file, so that you'll get your desired resolution upon reboot/startup:

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

    #!/bin/bash
sudo xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
sudo xrandr --addmode Virtual1 1920x1080_60.00
xrandr --output Virtual1 --mode 1920x1080_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.

OR you can go the easy way and use a program that does the above for you - ResolutionX.

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