INFO    : GSettings missing key org.gnome.nautilus.desktop (key computer-icon-visible)
INFO    : Schema missing summary org.gnome.settings-daemon.peripherals.gschema.xml (key repeat)
INFO    : Schema missing summary org.gnome.settings-daemon.peripherals.gschema.xml (key click)
INFO    : Schema missing summary org.gnome.settings-daemon.peripherals.gschema.xml (key click-volume)
INFO    : Schema missing summary org.gnome.settings-daemon.peripherals.gschema.xml (key bell-mode)
INFO    : Schema missing summary org.gnome.settings-daemon.peripherals.gschema.xml (key bell-pitch)
INFO    : Schema missing summary org.gnome.settings-daemon.peripherals.gschema.xml (key bell-duration)

(gnome-tweak-tool:2339): Gdk-ERROR **: The program 'gnome-tweak-tool' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadImplementation (server does not implement operation)'.
  (Details: serial 349 error_code 17 request_code 131 minor_code 46)
  (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 GDK_SYNCHRONIZE environment
   variable to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)