raspberry hdmi display set

0. modify system soft source(reference:https://mirrors.tuna.tsinghua.edu.cn/help/raspbian/)　　

　　deb http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ buster main non-free contrib rpi

　　deb https://mirrors.tuna.tsinghua.edu.cn/raspberrypi/ buster main

1. modify  /boot/config.txt

　　sudo  vi   /boot/config.txt

2. modify line:

　　hdmi_group=2 (使用显示器而不是TV)
　　hdmi_mode=82 (1920x1080 60fps)

3. sudo apt update && sudo apt upgrade