[Samba] Roaming Profiles & oplocks problems

Rob Mason rob at cissp.org.uk
Sun Oct 16 23:12:47 GMT 2005

On Sun, Oct 16, 2005 at 10:58:17PM +0100, Rob Mason wrote:
> On Sun, Oct 16, 2005 at 02:40:58PM -0700, Jeremy Allison wrote:
> > On Sun, Oct 16, 2005 at 09:37:25PM +0100, Rob Mason wrote:
> >  
> > > Thanks.  This was one of the first things I went for a few days ago, but
> > > am unable to see any connectivity or name resolution problems on my
> > > LAN???
> > > 
> > > All the boxes are able to ping each other, and my admin station is able
> > > to work with shared printers and files without any probs (not using
> > > roaming profiles)...
> > > 
> > > Is the oplock problem definitely indicative of network failure???
> > 
> > Yes. Check driver versions on Windows, network cabling and hardware
> > hubs/switches.
> > 
> > Jeremy.
> I'll try isolating the PDC and client using a cross-over cable - I'll
> let you know how I get on.
> One quick question - I have a gut feeling that there could be
> a permission problem.  What are the defintive perms on the [profiles]
> directory and user directory within [profiles]?  For the life of me I
> can't find this info in the FAQ...
> Rgds
> Rob

Well, as I thought there was no LAN 'issue' as such.  I've swapped cables, NICS,
switches - and used the cross-over cable straight between the server and
a client.

However, I believe I have diagnosed the fault.  I've been monitoring
some of the traffic using my laptop and have inadvertently logged into
the domain as a domain user from my laptop - it worked fine.  This got
me to thinking that the problem may be related to the ghosted images on
the XP clients (yes I generated a new SID).  At first I thought it could
be the NIC drivers, so I changed one of the 3coms to a Intel.  This
didn't chnage anything.  The only other hardware common to all clients
was the video card - an NVIDIA TNT2 M64.  A quick Google on 'NVIDIA
samba roaming profiles' got me:


After removing the NVIDIA driver from my test client the problem
completely vanished!  Go figure!  I'm completely at a loss for words.
Why video driver software would affect SMB comms is completely baffling.
I've put this one down to experience and will in future test hardware
combinations prior to adding into the LAN.

Thanks for all the help and guidance, it was truly appreciated.  And I
guess it was a network issue in the end!!!

many thanks


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