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Gin Gon
Asked: 2016-05-29 18:09:38 +0800 CST

How to fix xrandr scaling

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I have two monitors side by side. One is 3840x2160@30hz the other is 1280x1024@60hz. I am trying to set the smaller monitor's scale:

xrandr --output VGA1 --scale 2x2

With this command only 1/4 of the monitor is usable.

How can I fix this issue with xrandr?

multiple-monitors

1 Answers

  1. Best Answer

    Due to the bug described here, I had to patch and recompile the xserver-xorg-core package using Chris Wilson's patch.

    Here's how I did it:

    Download the source and patch for the xserver-xorg-core package.

    mkdir src && cd src

apt-get source xorg-server

cd xorg-xserver-x.xx.x/randr

wget -O- "https://bugs.freedesktop.org/attachment.cgi?id=94929" > randr.patch

    Patch xrandr:

    patch -p1 < randr.patch

    At 

    File to patch:

    type:

    rrcrtc.c

    Install build dependencies:

    sudo apt-get build-dep xserver-xorg-core

    Install more build packages:

    sudo apt-get install build-essential devscripts fakeroot

    Compile the package:

    cd ..

debuild -us -uc -i -I

    Install the new package:

    sudo dpkg -i xserver-xorg-core_x.xx.x-x.deb

    Restart your DE and xrandr should now scale perfectly!

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