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I used to use the xcalib -i -a command on my old desktop system running 18.04 with an onboard Intel graphics card. This xcalib -i -a command successfully inverted my system colors.

I just got a fancy new 20.04 desktop with a Radeon graphics card and now when I issue the xcalib -i -a command the screen output is just garbled. I can barely make out the terminal and I issue the xcalib -i -a command again to make my screen go "back to normal".

Why doesn't xcalib -i -a work anymore, and is there any other way to quickly invert Ubuntu 20.04 screen colors?

I'm running a default session which I believe is X11 and NOT Wayland. So not sure why I'm having issues. And xrandr --output VGA-0 --brightness -1 does not work, and garbles my screen output the same as described above.

Display name
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1 Answers1

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The extension "Invert Color" might work for you as a quick-fix if you work in a Gnome environment. See https://github.com/maiself/gnome-shell-extension-invert-color

appultaart
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