I want to set 1920x1200 and refresh 58Hz to display,What ever I use xrandr get
	
	
	
		
I want to know what is the next setp to solve the question.Thinks!
				
			
		Code:
	
	X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  18 (RRAddOutputMode)
  Serial number of failed request:  41
  Current serial number in output stream:  42I want to know what is the next setp to solve the question.Thinks!
 
			     
 
		