ok thks for everything! .. i'm going to try your path now with basic xorg configuration. Driver "ati" and BusID "PCI:1:0:0" only.
-- system freeze when using ati radeon 7000 with xorg "ati" driver https://launchpad.net/bugs/16873 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs