Arch Linux

expatcoder

Member

Registered: 2014-05-30

Posts: 4

RandR a la Xinerama separate X screens

Trying to get with the modern world by moving from deprecated Xinerama to RandR.

I'm able to strip down my xorg.conf to the minimum (i.e. monitor sections) and get randr setup working, but one roadblock I'm hitting is that unlike Xinerama, where you can stich together separate X screens across a single display (i.e. available monitor real estate), randr creates a single X screen.

This is an issue for me since I use the xcalib package to calibrate my monitors and, crucially, invert screen color on a per X screen basis. It's quite jarring on the eyes to invert from preferred black background to white across all screens. In a Xinerma setup if I have Firefox open on my primary monitor and want to see how a site I'm working on "really" looks, I can invert that screen alone in isolation (vs. all 3 monitors with randr).

Anyone know how to pull off the pseudo separate X screens that Xinerma provides, but in randr??

Barring that, any suggestions for an xcalib replacement that can invert screen colors by identifying the physical monitors? Unfortunately xcalib seems to be screen/display based and randr works off screen 0/display :0 by default.

Thanks

progandy

Member

Registered: 2012-05-17

Posts: 5,322

Re: RandR a la Xinerama separate X screens

If you adjust only brightness and gamma correction, you should be able to do that with the xrandr binary.
To invert the colors of a single screen, you might be interested in this: https://github.com/zoltanp/xrandr-invert-colors

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| alias CUTF='LANG=en_XX.UTF-8@POSIX ' | alias ENGLISH='LANG=C.UTF-8 ' |

expatcoder

Member

Registered: 2014-05-30

Posts: 4

Re: RandR a la Xinerama separate X screens

Thanks, I'll give the invert colors lib a try.