When I upload a big file, it stops for a long time and responds with this error:
has expired: ... AH01075: Error dispatching request to : (reading input brigade) ...
I saw that on server the file is nearly uploaded, only few bytes remaining, but it stops receiving. Maybe it checks the file in memory finding the type and stops.
more here: phpinfo
php code like in example code: upload.php
Fix SSLRenegBufferSize to your need in apache2 configuration
in apache2 sites-enabled conf file add the following line inside <Directory ...>
brackets :
"SSLRenegBufferSize 1024000" or more