See URL to screetshot. FancyPlotter seems not to set a background color, instead (I think) grabbing the inactive color from the QT palette. The darker color in the background of the screenshots is created whenever the window is inactive, the white background is created when the window is active. Reproducible: Always Steps to Reproduce: 1. Open Ksysguard to a plot 2. Give and remove focus to the Ksysguard window a few times. Actual Results: The plot background alternates between two colors. Expected Results: The plot background should remain constant. Tested on both 5.6.* in the Arch repositories and on the tagged 5.7 release which I built myself.
I don't see this issue in recent versions (though I haven't tested with other themes). Closing this assuming it was fixed inadvertently.