Where is sorting customization for header bar arrows in list view located?

Question

We are trying to move to a new virtualized server.

I have changed no code and only the MySQL version has change from 5.5 to 5.1

Now the sorting arrows in the list view header in one of the custom modules doesn't work.

I am trying to find where any customization to this module has in the way of sorting.

Note: The advance search still sort correctly.

Amy Cox · Accepted Answer

We found the issue. While changing the server the System Administrator changed some settings as well. The issue was tracked down to an issue in the server config, specifically a couple of php.ini variables: suhosin.post.max_name_length suhosin.request.max_varname_length These variables have a default value of 64 characters, and the request variable generated when you try to sort a column in the Admission Applications List view was being dropped by the server due to these config values. They increased the limits to 96 chars within /etc/php5/apache2/conf.d/suhosin.ini and that seemed to resolve the issue.