For anyone having some weirdness in X/KDE after updating to the latest current ~ May, there are some extras you need to do. First for the latest release of Xorg, some packages have been split and as such, you will have new packages that have probably not been installed. Go through recent entries in Changelog and manually install those new packages ( look for “Added” ). Then, make sure you reinstall any binary video drivers – this fixed my mirrored and rotated display. Hope that helps someone.