转载自：李昊哲小课　

1.可以通过xrandr命令来设置屏幕分辨率。先查询当前分辨率，及当前支持的分辨率。

xrandr -q

显示结果如下：

Virtual1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768      60.00*+  60.00  
   2560x1600     59.99  
   1920x1440     60.00  
   1856x1392     60.00  
   1792x1344     60.00  
   1920x1200     59.88  
   1600x1200     60.00  
   1680x1050     59.95  
   1400x1050     59.98  
   1280x1024     60.02  
   1440x900      59.89  
   1280x960      60.00  
   1360x768      60.02  
   1280x800      59.81  
   1152x864      75.00  
   1280x768      59.87  
   800x600       60.32  
   640x480       59.94  
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)

xrandr -q当前分辨率为1024x768

2.可以通过-s参数来设置为1920x1080

cvt 1920 1080

显示如下:

# 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

注：1920 1080 即你想使用的分辨率 （modeline为扫描频率）

xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

xrandr --addmode Virtual1 "1920x1080_60.00"

xrandr --output Virtual1 --mode "1920x1080_60.00"

xrandr -s 1920x1080

3.同样也可以通过-s 0，来设置为默认的分辨率

xrandr -s 0