# xrandr --newmode 1280x800 83.50  1280 1352 1480 1680  800 803 809 831 -hsync +vsync
X Error of failed request:  BadName (named color or font does not exist)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  16 (RRCreateMode)
  Serial number of failed request:  27
  Current serial number in output stream:  27