Joining the modern era: Xinerama to XRandR

[Noah Cutler]

Got RandR setup in place here with a 3 monitor setup, but have hit a sticky
wicket relative to previous Xinerama setup (which I have reverted to until
I find a suitable workaround).

With Xinerama we can stich together separate X screens under a single large
display. This allows me to use my monitor calibration/screen inversion
application *xcalib*, on a per screen basis.

For example, by default all screens are inverted (i.e. black background)
but sometimes I need to see a website I'm working on as it really looks
against a white background. With Xinerma I can toggle background color on a
single monitor. With RandR all 3 screens invert at once, which is jarring
on the eyes.

Is there way to get RandR to simulate Xinerma multiple pseudo separate X
screens? Barring that, another calibration/inversion program that allows
one to change state on a per physical monitor basis?

*xcalib* only works with screen x/display :x and RandR only has a single
screen, thus the all-at-once jarring state change.

Thanks for ideas