During buildtime, everything seems fine: configure:17673: checking for xrandr >= 1.2.0 configure:17677: result: 1.3.2 During runtime, xfce4-display-settings doesn't start: Unable to start the Xfce Display Settings This system is using RandR 1.1. For the display settings to work version 1.2 is required at least Mind digging around for this one? If requested, I will go upstream but they may not understand the concept of Gentoo Prefix?
The build system gets the version from xrandr.pc which is correctly fetched from the prefix. During runtime, xfce4-settings queries the X server via XRRQueryVersion(). In your case, I'd guess the X server is not started from the prefix. In that case it correctly reports an older randr version (assuming the host does indeed run 1.1). Please correct me if any of this is wrong.
does this still happen with 4.12? please reopen if it does