由于“配置中定义的控制用户连接失败。”错误，我的codeigniter模型无法正常工作

I am working on codeigniter in ubuntu. My models are not working because of "Connection for controluser as defined in your configuration failed." error occurred in my phpmyadmin.

May be, you have wrong credentials in your[ .../phpMyadmin/config.inc.php] file.Please check first...

You can change the username and the password in the above file with your values.

$cfg['Servers'][$i]['auth_type'] = 'config';
$cfg['Servers'][$i]['user'] = 'root'; //Change it with your values
$cfg['Servers'][$i]['password'] = 'root';  //Change it with your values
$cfg['Servers'][$i]['extension'] = 'mysql';
$cfg['Servers'][$i]['AllowNoPassword'] = true;
$cfg['Lang'] = '';