The last lines show the error - as suspected the sudoers file does not install correctly. could you post the output of: Code: ls -al /etc/sudoers.d/cleven.sudoers ls -al /etc/sudoers.d/ PS: it is difficult for me to test as I don't have your kernel version. If there is no real reason for staying to the old version, then you should upgrade to the latest supported kernel.
ls -al /etc/sudoers.d/cleven.sudoers ls -al /etc/sudoers.d/
drwxr-xr-x 2 root root 2960 Feb 18 14:53 . drwxr-xr-x 88 root root 9504 Feb 18 14:53 .. -rw-r--r-- 1 root root 1276 Apr 17 2009 01sudo -rw-r--r-- 1 root root 58 Sep 11 2011 CSSUfeatures.sudoers -rw-r--r-- 1 root root 88 Aug 3 2012 advanced-interface-switcher.sudoers -rw-r--r-- 1 root root 87 Apr 6 2011 advanced-power-monitor.sudoers -rw-r--r-- 1 root root 53 Nov 5 2011 community-ssu.sudoers -rwxrwxr-x 1 root root 180 Apr 19 2011 customizer.sudoers -rwxr-xr-x 1 root root 45 Nov 10 2010 extkbd.sudoers -rw-r--r-- 1 root root 42 Feb 20 2011 fmms_magic.sudoers -rw-r--r-- 1 root root 44 Jul 1 2010 gnome-nettool.sudoers -rw-r--r-- 1 root root 299 Mar 29 2010 hildon-application-manager.sudoers -rw-r--r-- 1 root root 46 Feb 22 2010 hildon-control-panel-personalisation.sudoers -rw-r--r-- 1 root root 200 Nov 12 2009 hildon-input-method-configurator.sudoers -rw-r--r-- 1 root root 80 Nov 6 2010 hostmode.sudoers -rw-r--r-- 1 root root 54 Aug 22 2011 kernel-power-flasher.sudoers -rw-rw-r-- 1 root root 47 May 2 2010 kernel-power.sudoers -rw-r--r-- 1 root root 51 Feb 10 2011 led-pattern-editor.sudoers -rw-r--r-- 1 root root 34 Sep 14 2010 lfocus.sudoers -rw-r--r-- 1 root root 75 Feb 17 2010 mafw-dbus-daemon.sudoers -rw-rw-r-- 1 root root 44 Aug 6 2010 mceledpattern.sudoers -rw-r--r-- 1 root root 392 Apr 9 2009 osso-af-startup.sudoers -rw-r--r-- 1 root root 445 Feb 17 2010 osso-app-killer.sudoers -rw-r--r-- 1 root root 201 Feb 5 2010 osso-applet-languageregional.sudoers -rw-r--r-- 1 root root 108 Mar 7 2012 pierogi.sudoers -rw-r--r-- 1 root root 39 Jun 21 2010 powertop.sudoers -rw-r--r-- 1 root root 45 Mar 12 2011 profilesx.sudoers -rw-r--r-- 1 root root 50 Nov 5 2010 qcpufreq.sudoers -rw-r--r-- 1 root root 101 Jan 25 2010 ssc-daemon.sudoers -rw-r--r-- 1 root root 45 Sep 10 2010 ssh-status.sudoers -rw-r--r-- 1 root root 53 Mar 20 2011 swappolube.sudoers -rw-r--r-- 1 root root 42 Jan 7 2010 tscalibrate.sudoers -rw-r--r-- 1 root root 50 Oct 26 2010 tweakflashver.sudoers -rw-r--r-- 1 root root 91 Apr 6 2011 update-desktop -rw-r--r-- 1 root root 54 Sep 19 2011 vibration.sudoers -rw-r--r-- 1 root root 142 Feb 15 2010 wizard-mounter.sudoers