安装Mantis问题解决。

其实遇到这个问题时，新建一个用户然后在MYSQL里选择这个用户的验证方式为OLD_PASSWORD就可以了。

This seems to be quite a common error for many people installing PhpMyAdmin for the first time.

The phpmyadmin (pma) docs mention it - basically stating that the mysql client is out of date.

In the past I've solved this by updating my version php, and also by using the manual install as the windows installer package uses (well it used to) an old version of the mysql client library.

However today I discovered a simple work here (thanks a million to whoever posted it!!!!) - and what a simple solution it is!  Just run the following SQL to reset your password:

SET PASSWORD FOR user@localhost = OLD_PASSWORD('password');






MySQL 4.1 and up uses an authentication protocol based on a password hashing algorithm that is incompatible with that used by older clients. If you upgrade the server to 4.1, attempts to connect to it with an older client may fail with the following message:

shell> mysql
Client does not support authentication protocol requested by server; consider upgrading MySQL client

To solve this problem, you should use one of the following approaches:

• Upgrade all client programs to use a 4.1.1 or newer client library.
• When connecting to the server with a pre-4.1 client program, use an account that still has a pre-4.1-style password.
• Reset the password to pre-4.1 style for each user that needs to use a pre-4.1 client program. This can be done using the SET PASSWORD statement and the OLD_PASSWORD() function:

  mysql> SET PASSWORD FOR
      -> some_user@some_host = OLD_PASSWORD('newpwd');