Invert/negative screen

Asked by Karl Morrison

I've tried the following approachs.

xcalib -invert -alter -display

This only works on one screen(I run two screens) and does not work with Redshift.

compiz. I can't get the Negative plugin to start.

sudo apt-get install compiz compiz-plugins compizconfig-settings-manager compiz-plugins-extra

Even if I try a new shortcut command it doesn't work.

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Launchpad Janitor (janitor) said :
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This question was expired because it remained in the 'Open' state without activity for the last 15 days.