Ok, I'm almost there. I found a typo in my xorg.conf - actually, I had copies one from someone out there that said it worked. Fixing that, in the ServerLayout section, and I've now got the two screens, side by side, and reachable. My two remaining problems: first, if I scroll around, it appears as though X thinks that the screen is bigger than the monitor, and it moves visible off the top of the monitor, leaving an L of black. The other is, if I log in as root, and try to use System->Display, it tells me RandR is disabled; meanwhile, in /var/log/Xorg.0.log, there are the two entries, one for each displayport, that say "ignore the following randr disabled message.... mark _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos