Just attaching my xorg.conf, in case it might help. As mentioned in my previous post I am having no troubles when I am in "single head" mode, but as soon I attach another display a freeze will occur (not instantly, but surely) - this is also true even if I comment out the Xinerama configuration and run with two separate X-Screens.
-- [dapper] xrandr freezes the system (radeon, MergedFB) https://launchpad.net/bugs/47775 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
