Comment 3 for bug 235817

This is not a bug in ampache but instead is a misconfiguration of the users system. According to the DpkgTerminalLog the user has three web servers installed on his system, caudium, apache2 and apache2-mpm-prefork.
1. On line 1543 apache2 is restarted with no problems.
2. On line 1896 the caudium web server is installed and started
3. On line 2545 apache2 attempts to restart after apache2-utils and apache2.2-common are installed. Starting apache2 fails and restarting fails. this could be due to caudium or apache2 webservers being bound to port :80 thus not allowing apache2-mpm-prefork from starting. From this point on apache2 never starts or restarts.

As restarting the apache2-mpm-prefork web server is part of ampache's postinst script. If apache2-mpm-prefork will not restart then this will return a exit status of 1 causing the installation to fail.