Red Hat Bugzilla – Bug 2655
gdm fails to honor XDMCP requests!!
Last modified: 2015-06-04 00:47:56 EDT
Install RH6.0, choose to "launch X by default" during the
When you boot the new system, GNOME pops up with a login
dialog. So far so good.
Now switch to a virtual console and type
startx -- -query 127.0.0.1 :1
This command starts X but FAILS to get to a login screen!
This is quite serious :-)
Note, if I change /etc/X11/prefdm so it points to "xdm", the
above command works fine.
Another note: when using gdm, traffic sent to the XDMCP port
queues up and is never read. The port should either be
fixed, or disabled- if it isn't used it's a security concern
The workaround for now is to enable debugging by changing
Enable=0 to Enable=1 in the [debug] section of /etc/X11/gdm/gdm.conf.
This is most certainly a workaround and not a bugfix...
The workaround does not fix the fact that it listens when not
configured to do xdmcp.
------- Additional Comments From 08/24/99 10:31 -------
A little extra info: GDM will respond to XDMCP requests when they
are DIRECT or QUERY requests (sent to the specified host). It fails
when the requests are of type BROADCAST.
*** This bug has been marked as a duplicate of 2614 ***
------- Additional Comments From 10/20/99 17:24 -------
Contrary to the orginal comments from Redhat, my workstation is not
responding to 'DIRECT or QUERY requests'. I just picked up 6.1 last
night hoping that this (and other problems) were resolved and it is
not. I have not tried the listed workaround.
Commit pushed to master at https://github.com/openshift/origin
Fix issue#2655; bz1225410; rebase openshift-sdn Godeps