解决ubuntu18锁屏后显卡失效问题

1、禁用ubuntu自动更新

sudo vi /etc/apt/apt.conf.d/10periodic

APT::Periodic::Update-Package-Lists "0";
APT::Periodic::Download-Upgradeable-Packages "0";
APT::Periodic::AutocleanInterval "0";
APT::Periodic::Unattended-Upgrade "0";