My admin > modules page is blank

This is most likely a memory issue. On this page all modules are loaded, whether they are enabled or not. This can cause PHP to run out of available memory.

There are two fixes:

1. Remove (unused) modules--the quickest/easiest solution.
2. Increase PHP's memory limit, either by adding:
   • memory_limit = 12M to your php.ini file (recommended, if you have access)
   • ini_set('memory_limit', '12M'); in your sites/default/settings.php file
   • php_value memory_limit 12M in your .htaccess file in the Drupal root

   Depending on the amount of modules you have enabled and their 'impact' on the site you may need to increase the memory_limit even more. Experiment with what memory value works for your needs.

Note that some hosts allow a php.ini file in the root of your site.

All fatal errors can result in a blank modules page. If you want to be sure if the memory limit is causing this problem, you should check your web server error logs. Hunt for a line that looks like:

Always keep in mind that generally, "Less is More." The less memory your installation consumes, the faster it is, and the more people can visit your site at one time.

You may have to restart Apache for the configuration changes to take effect, especially if you edit php.ini.