17 processes are wasting resources when akonadi isn't used

I don't want to use Akonadi but I still want to use Kde.

Although I disabled the Akonadi feature into the user option and disabled the tray icon as well, I still have many Akonadi processes which are wasting resources.

Below is the faulty processes :
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~$ ps x | grep -i akonadi
 1380 ? Sl 0:00 /usr/bin/akonadi_control
 1382 ? Sl 0:00 akonadiserver
 1387 ? Sl 0:00 /usr/sbin/mysqld --defaults-file=/home/m/.local/share/akonadi//mysql.conf --datadir=/home/m/.local/share/akonadi/db_data/ --socket=/home/m/.local/share/akonadi/socket-m-bureau/mysql.socket
 1452 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_akonotes_resource akonadi_akonotes_resource_0
 1453 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_contacts_resource akonadi_contacts_resource_0
 1454 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_contacts_resource akonadi_contacts_resource_1
 1455 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_contacts_resource akonadi_contacts_resource_2
 1456 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_contacts_resource akonadi_contacts_resource_3
 1457 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_contacts_resource akonadi_contacts_resource_4
 1458 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_contacts_resource akonadi_contacts_resource_5
 1459 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_contacts_resource akonadi_contacts_resource_6
 1461 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_contacts_resource akonadi_contacts_resource_7
 1462 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_ical_resource akonadi_ical_resource_0
 1463 ? Sl 0:00 /usr/bin/akonadi_agent_launcher akonadi_maildir_resource akonadi_maildir_resource_0
 1465 ? S 0:00 /usr/bin/akonadi_maildispatcher_agent --identifier akonadi_maildispatcher_agent
 1466 ? Sl 0:00 /usr/bin/akonadi_nepomuk_calendar_feeder --identifier akonadi_nepomuk_calendar_feeder
 1467 ? Sl 0:00 /usr/bin/akonadi_nepomuk_contact_feeder --identifier akonadi_nepomuk_contact_feeder
 2249 pts/0 R+ 0:00 grep --color=auto -i akonadi
~$
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ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: akonadi-server 1.6.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Mon Jan 2 18:58:02 2012
InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: akonadi
UpgradeStatus: No upgrade log present (probably fresh install)