Thread:Project:Support desk/pages blank after upgrade 1-15.5 to 1-16.1 and remain so after restoring 1-15.1

mediawiki 1-15.5 upgrade problem to 1-16.1 mysql 5.1.37 on Ubuntu 9.04 PHP 5.2.10

On Ubuntu 9.04, with MW 1-15.5 in successful use for two years, I updated PHP to 5.2.10.dfsg.1-2ubuntu6.6 and all seemed well. After backing up the wiki directory and the mysql, I installed 1-16.1 from the tarball. All pages were blank. I restored the wiki directory and the mysql, and reran maintenance/update.php. The pages remained blank.

I repeated the 1-16.1 tarball expansion, I added error_reporting( E_ALL ); ini_set( 'display_errors', 1 ); at the top of LocalSettings.php and reran update.php. Nothing is displayed after running update.php.

Nothing about PHP is in the apache2 logs nor syslog. The apache2 access log correctly reflects the client requests to the mediawiki installation, but nothing associated with it is in the apache2 error log, nor do I see any evidence in the mysql logs that any query was launched against the database (Perhaps that is a mysql configuration issue).

I have been unsuccessful in enabling PHP logging to files. I've specified /var/log/php.log in php.ini in both /etc/php5/apache2 and /etc/php5/cli/php.ini and set log_errors=On in both.

I haven't tried to back out the PHP security update, especially since I'd have to figure out where the older one is in ubuntu repositories, and since the whole thing seemed to work ok after I updated the php anyway.

What should I try next?

Thanks Bob