title: mysql: access denied on information_schema
body: <p>When i'm create new user or grant privileges to existing, i got this error:</p>
  
  <pre><code>ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
  </code></pre>
  
  <p>Grant privileges ok on all tables, except information_schema, on this table i got access denied error.
  How i can fix? Dump all databases, drop all databases, and then restore from dump?</p>