ubuntu 设置 1920*1080 分辨率

puyang@puyang-virtual-machine:~$ cvt 1920 1080
# 1920x1080 59.96 Hz (CVT 2.07M9) hsync: 67.16 kHz; pclk: 173.00 MHz
Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
puyang@puyang-virtual-machine:~$ xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
puyang@puyang-virtual-machine:~$ xrandr --addmode DIV1 "1920x1080_60.00"
xrandr: cannot find output "DIV1"
puyang@puyang-virtual-machine:~$ xrandr --addmode VGA1 "1920x1080_60.00"
xrandr: cannot find output "VGA1"
puyang@puyang-virtual-machine:~$ xrandr --addmode "VGA1" "1920x1080_60.00"
xrandr: cannot find output "VGA1"
puyang@puyang-virtual-machine:~$ xrandr --addmode defalut "1920x1080_60.00"
xrandr: cannot find output "defalut"
puyang@puyang-virtual-machine:~$ xrandr --addmode HDMI1 "1920x1080_60.00"
xrandr: cannot find output "HDMI1"
puyang@puyang-virtual-machine:~$ xrandr --current
Screen 0: minimum 1 x 1, current 1920 x 1200, maximum 16384 x 16384
Virtual1 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   800x600        60.0 +   60.3  
   2560x1600      60.0  
   1920x1440      60.0  
   1856x1392      60.0  
   1792x1344      60.0  
   1920x1200      59.9*
   1600x1200      60.0  
   1680x1050      60.0  
   1400x1050      60.0  
   1280x1024      60.0  
   1440x900       59.9  
   1280x960       60.0  
   1360x768       60.0  
   1280x800       59.8  
   1152x864       75.0  
   1280x768       59.9  
   1024x768       60.0  
   640x480        59.9  
Virtual2 disconnected (normal left inverted right x axis y axis)
Virtual3 disconnected (normal left inverted right x axis y axis)
Virtual4 disconnected (normal left inverted right x axis y axis)
Virtual5 disconnected (normal left inverted right x axis y axis)
Virtual6 disconnected (normal left inverted right x axis y axis)
Virtual7 disconnected (normal left inverted right x axis y axis)
Virtual8 disconnected (normal left inverted right x axis y axis)
  1920x1080_60.00 (0x2a2)  173.0MHz
        h: width  1920 start 2048 end 2248 total 2576 skew    0 clock   67.2KHz
        v: height 1080 start 1083 end 1088 total 1120           clock   60.0Hz
puyang@puyang-virtual-machine:~$ xrandr --addmode Virtual1 "1920x1080_60.00"
puyang@puyang-virtual-machine:~$ xrandr --output Virtual1 --mode "1920x1080_60.00"