RT，用了xrandr，显示的信息是
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 32767 x 32767
LVDS1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
   1366x768       60.0 +
   1360x768       59.8     60.0  
   1024x768       60.0*
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080      60.0 +
   1680x1050      60.0  
   1280x1024      75.0     60.0  
   1152x864       75.0  
   1024x768       75.1*    60.0  
   800x600        75.0     60.3  
   640x480        75.0     60.0  
   720x400        70.1  
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)

然后xrandr --output VGA1 --mode 1920x1080
屏幕一闪变黑然后又回到原来的分辨率。电脑：T430s集显，似乎没安装intel的graphics drivers，装的时候显示distribution not supported. Deepin版本2013