You should probably go here and see if a bug report exists and file one if it does not:
https://bugs.kde.org/, I would do the same with openSUSE 12.3 if you are doing any testing with it. As for the main distro of openSUSE 12.2, it came with 4.8 and was never tested with KDE 4.10 and so problems like this do not surprise me. If your monitor not working is a bother, you should consider sticking with the KDE version that came with the openSUSE version release you are using and wait for the next openSUSE version to move you on forward, in now a very shorty time, where it will be a covered front line problem to be fixed, if it still exists. Check it out right now to make sure it gets fixed:
software.opensuse.org: Download openSUSE 12.3 RC 1
Thank You,
Bookmarks