Thank you for answer, but I started messing with default configuration because this did not return any search results either.
This is what my original configuration looked like
<------># Group membership checking. Disabled by default.
<------>#
<------># groupname_attribute = cn
<------># groupmembership_filter = "(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))"
I used original conf to generate a debug log for this.
And YES, the adding "control:" helped. So basically it's a package bug. I will inform Suse freeradius package maintainer.
Thank you, again.
Andres