ddcprobe returns correct values, but xresprobe somehow doesn't mangle them. Could you try running xresprobe in console, shutting X first down? And what does /usr/share/xresprobe/ddcprobe.sh give?
ddcprobe returns correct values, but xresprobe somehow doesn't mangle them. Could you try running xresprobe in console, shutting X first down? And what does /usr/share/ xresprobe/ ddcprobe. sh give?