Re: XDMCP

[Robert Brockway <rbrockway@opentrend.net>]

On Sat, 28 Apr 2007, Daniel D Jones wrote:

> Running unstable.  Trying to get XDMCP working via KDM.  On the local host,
> everything works.  KDM gives me a graphical login prompt, and KDE loads when
> I log in.  From a remote machine, however, I get what appears to be a pure X
> session with no Windows manager running.  I get the hollow X cursor, and am
> able to move it with the mouse.  However, neither left nor right clicks do
> any thing - no menu or anything.  Clicking and dragging doesn't generate a
> dotted outline selection.  No key presses appear to do anything.  Not sure
> where to go from here.  Hints and suggestions welcome.

Checkout /etc/kde3/kdem/Xaccess to see what sorts of xdmcp access you 
are allowing.  At the least you want to offer:


*                                       #any host can get a login window

You may also want to allow:


*               CHOOSER BROADCAST       #any indirect host can get a chooser

Also you need to enable xdmcp in kdmrc:

# Whether KDM should listen to incoming XDMCP requests.
# Default is true
Enable=true

Restart kdm at this point.

Make sure you backup kdmrc before making any changes so you can rollback 
if you break it.

One more thing:  There is a reported but unfixded bug in kdm in 
Debian/Ubuntu going back a long way which is causing some xdmcp 
configurations to fail when they really are ok.  If you look in your logs 
you'll see reports of kdm_greet getting memory corruption if you are 
getting this problem.  As a result of this problem I recently migrated a 
bunch of thin client servers to use gdm instead of kdm.

Cheers,

Rob

--
Robert Brockway B.Sc.        Phone:          +1-905-821-2327
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