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I've recently installed Xubuntu 18.04 on an old refurbished ThinkPad X250. It's working well, though one thing that would help usability a lot would be if I can increase the screen contrast. The blacks aren't especially dark, and the whites aren't especially bright - it's just not a very high-quality LCD - and it causes some eyestrain, especially when most applications are using lower-contrast colors that are intended to be readable on higher-contrast displays than this one.

To help things, I'd like to find a way to change display contrast settings and increase color contrast - if such a thing exists - or failing that use a post-process shader or similar tool to make dark colors darker, light colors lighter, and increase contrast that way. Prudent choice of xfce theme and application color schemes has helped a little, but global contrast adjustment tools would help much more.

I have already tried changing gamma settings. This makes the blacks darker, which is great, but it makes the whites darker too. So it doesn't really help anything.

I have also tried xcalib, and while it does have a contrast setting, contrast can only be decreased and cannot be increased using this tool.

Surely there must be options here. What can I do to make my screen easier to look at?

  • If you don't have success with global contrast tools, you should still be able to get a lot done by editing application themes and if you have problems with individual applications, you could post separate questions for each issue you face. – DK Bose Aug 3 at 11:52

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