In my experience winbind is unable to set the foo.ad.acme.com DNS name. It even tells you this as you join the client to the AD.
Sorry, but I got nothin'
> -----Original Message-----
> From: Platform Independent Linux List! [mailto:[log in to unmask]]
> On Behalf Of Pollock,Daniel
> Sent: Tuesday, November 16, 2010 10:56 AM
> To: [log in to unmask]
> Subject: Ubuntu 10.04.1 LTS DHCP/DNS
> I am running Ubuntu Server 10.04.1 LTS and using DHCP
> (mydomain.acme.com). I have also joined Active Directory using
> Samba/Winbind. (ad.acme.com)
> The problem: I can ping the box by name, but not by name.ad.acme.com.
> On my windows machines, I can ping them either way.
> Any suggestions or do I have to choose between name and
> name.ad.acme.com? I've been poking around in hosts, hostname, dhclient
> and other areas.
> -Dan Pollock