I faced the same problem here and solved by using vesa or fglrx drivers while disabling AIGLX. xorg.0.log and xorg.conf are attached.
** Attachment added: "xorg.conf" http://launchpadlibrarian.net/11068388/xorg.conf -- ATI X display : KDE screen 640x480 in top-left corner of a 1280x1024 screen https://bugs.launchpad.net/bugs/158962 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs