ubuntu锁定屏幕后显示“Authentication Failure Switch to greeter...”
Ubuntu版本:Ubuntu16.04.5LTS问题描述:锁屏后登录框提示“AuthenticationFailureSwitchtogreeter...”bug记录地址:AuthenticationFailure解决方法:在命令行执行如下命令:$sudoaptinstall--reinstalllightdm$sudoservicelightdmrestart注意,第二个命令会停止当前打开的a