I also have the same problem. Running Gutsy RC with an AMD X2 and the restricted NVidia drivers on a NVidia GeForce 6800.
Primary : 1280x1024 Secondary : 1680x1050 Primary monitor with desktop effects : PASS Two monitors with desktop effects : FAIL Secondary monitor as primary with no secondary : FAIL Two monitors without desktop effects : PASS These seem to be the same results as one of the above. Here are the errors that I receive: Checking for Xgl: not present. Detected PCI ID for VGA: 01:00.0 0300: 10de:0040 (rev a1) (prog-if 00 [VGA]) Checking for texture_from_pixmap: present. Checking for non power of two support: present. Checking for Composite extension: present. Comparing resolution (2960x1050) to maximum 3D texture size (4096): Passed. Checking for nVidia: present. Checking for FBConfig: present. Checking for Xgl: not present. Starting gtk-window-decorator The program 'gtk-window-decorator' received an X Window System error. This probably reflects a bug in the program. The error was 'RenderBadPicture (invalid Picture parameter)'. (Details: serial 341 error_code 181 request_code 157 minor_code 8) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the --sync command line option to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.) Segmentation fault (core dumped) -- desktop-effects and dual-head are incompatible https://bugs.launchpad.net/bugs/148352 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