I am having autocomplete problems as well but in my case, autocomplete 
does not work at all. It only works for local sql backend but nothing 
seems to work for ldap. When the recepient addres is typed in, I can 
see that turba queries ldap server and results are returned from the 
ldap server log but no autocomplete suggestions are shown..

Everything works in Turba with my ldap addressbooks. There are 
absolutely no problems with it. My only problem is autocomplete.

I checked debug logs and there are absolutely nothing interesting 
except that a request is made to the ldap server. But if needed I can 
provide debug logs as well.

Is there any other setting besides 'Prefs-> Mail-> Addressbooks' that 
relates to autocomplete and I am missing? I didn't have any problems 
with H3 before.

Whether  the solved bug #10961 and this one (#10843) related?

-ANANT

I tried setting search_sources and search_fields hard coded.  Still, 
it does not work for the additional LDAP attribute (staffno).   
According to my knowledge, hook is giving correct output, but the 
functionality is not working.

So, Neither hook works nor hard coding.

-ANANT.

So what now? Does it work or not? I'm talking about this single hook.

I can do that.  But, using hook makes it easy.
Yes. Hooks work everywhere else.  Even in IMP except that it does not 
do search based on the new attribute.  Please see this thread.

http://lists.horde.org/archives/imp/Week-of-Mon-20111031/052825.html

-Anant

Why don't you hardcode the return value of the 
search_sources/search_fields hook?
And does the hook actually work at all? If you go to the preferences, 
are the correct fields enabled?

I am attaching only relevant hook code.

Which hook? Post your hook code.

I have locked the pref and enabled the respective hook functions.

What do you mean?

My turba/backends.local.php has LDAP configuration as below.

$cfgSources['localldap'] = array(
// Disabled by default
'disabled' => false,
'title' => _("LDAP Directory"),
'type' => 'ldap',
'params' => array(
     'server' => 'localhost',
     'port' => 389,
     'tls' => false,
     'root' => 'dc=xxx,dc=xxxx',
     'bind_dn' => 'cn=Manager,dc=xxx',
     'bind_password' => 'xxxxx',
     'sizelimit' => 10,
     'dn' => array('cn'),
     'objectclass' => array('employee'),
     'scope' => 'sub',
     'charset' => 'utf-8',
     'checkrequired' => false,
     'checkrequired_string' => ' ',
     'checksyntax' => false,
     'version' => 3,
),
'map' => array(
     '__key' => 'dn',
     '__uid' => 'uid',
     'name' => 'cn',
     'email' => 'mail',
     'nickname' => 'staffnumber',
),
'search' => array(
     'name',
     'email',
     'nickname',
),
'strict' => array(
     'dn',
),
'approximate' => array(
     'cn',
),
'export' => false,
'browse' => false,
);

My IMP preferences are: imp/prefs.local.php

$_prefs['search_sources']['locked'] = true;
$_prefs['search_sources']['hook'] = true;
$_prefs['search_fields']['locked'] = true;
$_prefs['search_fields']['hook'] = true;
$_prefs['add_source']['locked'] = true;
$_prefs['add_source']['hook'] = true;


imp/hooks.local.php

enabled all cases of functions under

   public function prefs_init($pref, $value, $username, $scope_ob)

But, even after this, I am unable to auto complete address based on 
nickname/staffnumber.  This was working in H3.