I'm facing an issue when I try to migrate a Joomla installation to a different server. Let me first of all say I have copied all files from the old server to the new one, and migrated the Joomla database to a different server.
I've updated configuration.php to reflect the changes in the MySQL server.
When loading the site, it apparently works fine: connects to DB and allows all operations. However, when trying to access to the Joomla administration panel, and after successful login, an empty screen appears. There is no possible way to enter the backend.
I've configured the configuration.php file to enable error reporting:
Also, I've introduced the next line in the administrator/index.php file:
Despite of all this, no error appears in the Apache2 log (/var/log/apache2/error.log) nor in the Joomla logs (/var/www/logs/error.php).
I've tried disabling manually in the database some extensions, and actually came up with the fact that disabling the extension 'Jomsocial Update' allows to enter the backend, although the Jomsocial administration site cannot be accessed (a blank page appears once again).
For me, the weird thing is the fact of not getting any error at all in the logs.
Both the old and the new server have the same Apache version (2.2.22). However, the old server has PHP v5.4.6 whereas the new server has PHP v5.3.10. I've also tried installing PHP v5.4.28 from a non-official repository, but it also failed.
Do you know what may be happening? Thanks a lot for your support.