I installed xcalib using:

sudo apt-get install xcalib

Then I could invert color using:

xcalib -i -a

However after I restarted my computer this is not working. Why?

I tried removing xcalib using both:

sudo apt-get remove xcalib


sudo apt-get purge xcalib

and re-installed xcalib.

Still xcalib isn't inverting colors. How do I fix this?


p.s.: My question is different from this as I don't get any error message.

  • When should the command be executed? After logging in, or before? – A.B. Sep 27 '15 at 17:48
  • 1
    I would do it manually every time I log in: Go to the terminal and type the command. – Inspired_Blue Sep 27 '15 at 17:50
  • And there is no output in the terminal? – A.B. Sep 27 '15 at 18:13
  • 1
    I accidentally made it work - I changed the driver for the graphics card. And suddenly it worked. But again on restarting it doesn't work. I am unable to understand, where could be the problem even! – Inspired_Blue Sep 27 '15 at 23:20
  • 1
    @Inspired_Blue, Could you edit the question and add the output of xrandr --verbose – user.dz Jan 6 '17 at 16:11

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