$ xrandr --prop
Screen 0: minimum 320 x 200, current 1280 x 800, maximum 2880 x 1200
VGA connected 800x600+0+0 (normal left inverted right x axis y axis) 1mm x 257mm
	EDID_DATA:
		00ffffffffffff000610089d01010101
		070c0103100000963067a9a056479926
		11484c00006101010101010101010101
		01010101010101010101010101010101
		01010101010101010101010101010101
		01010101010101010101010101010101
		010101010101010101010101000000fc
		004e5453432f50414c0a202020200038
   1280x800       60.0  
   1280x768       60.0  
   1024x768       60.0  
   800x600        60.3* 
   640x480        59.9  
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 286mm x 179mm
	EDID_DATA:
		00ffffffffffff0006105f9c00000000
		08100103801d12780a2f309758538b29
		25505400000001010101010101010101
		010101010101bc1b00a0502017303020
		36001eb3100000180000000100061020
		00000000000000000a20000000fe004c
		503133335758312d544c4131000000fe
		00436f6c6f72204c43440a20202000c2
	BACKLIGHT_CONTROL: native
		supported: native       legacy       combination  kernel      
	BACKLIGHT: 375 (0x00000177) range:  (0,482)
   1280x800       59.9*+   60.0  
   1280x768       60.0  
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9  
TMDS-1 connected (normal left inverted right x axis y axis)
   1280x800       60.0  
   1280x768       60.0  
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9  
TV disconnected (normal left inverted right x axis y axis)
	BOTTOM: 37 (0x00000025) range:  (0,100)
	RIGHT: 46 (0x0000002e) range:  (0,100)
	TOP: 36 (0x00000024) range:  (0,100)
	LEFT: 54 (0x00000036) range:  (0,100)
	TV_FORMAT: NTSC-M
		supported: NTSC-M       NTSC-443     NTSC-J       PAL-M       
		           PAL-N        PAL