1.打开终端，编辑 /etc/systemd/logind.conf 文件,查找下面的选项并改成下面那样
HandleLidSwitch=ignore
HandleLidSwitchExternalPower=ignore
LidSwitchIgnoreInhibited=no
2.执行重启生效命令
systemctl restart systemd-logind
3.还是没效果的话，再执行
sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target