i recently installed roundcube using postgresql as my backend and developed the blank page problem that i saw several times in the forums:

DB Error: DB Error: connect failed in /var/www/html/roundcube/program/include/rcube_db.inc on line 97

postgresql, in my setting, was running on the same box that my web server was running. i knew the connection worked fine because i have a substantial codebase that was working fine. however, i wasn't using pear.

i was connecting via unix sockets. thus, my connection string in the config file had to look like:

$rcmail_config['db_dsnw'] = 'pgsql://username:password@unix(/tmp)/databasename';

the @unix(/tmp) was the key.

hopefully, this will help someone in the future.

mike

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