I reportet the bug to nvidia but they said: "This is a known X server bug which is triggered when using Composite with Xinerama. You should report it to Ubuntu. The current workaround is to disable Composite or Xinerama."
This is not the answer I liked to hear. I also get the bug by using multi-gnome-terminal: multi-gnome-terminal Gdk-CRITICAL **: file gdkwindow.c: line 1406 (gdk_window_get_visual): assertion `window != NULL' failed. Gdk-CRITICAL **: file gdkcolor.c: line 57 (gdk_colormap_new): assertion `visual != NULL' failed. class: Config prefix: /MultiTerminal/Win-Config/ Gdk-CRITICAL **: file gdkwindow.c: line 1406 (gdk_window_get_visual): assertion `window != NULL' failed. Gdk-ERROR **: BadDrawable (invalid Pixmap or Window parameter) serial 135 error_code 9 request_code 146 minor_code 5 Gdk-ERROR **: BadDrawable (invalid Pixmap or Window parameter) serial 136 error_code 9 request_code 55 minor_code 0 -- gnome-terminal does not start when using xinerama and nvidia https://launchpad.net/bugs/58232 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
