Bug 433572 - GDM fails to start in VNC session
GDM fails to start in VNC session
Product: Fedora
Classification: Fedora
Component: vnc-ltsp-config (Show other bugs)
All Linux
low Severity low
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Assigned To: Rex Dieter
Fedora Extras Quality Assurance
Depends On:
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Reported: 2008-02-19 20:31 EST by Jonathan Underwood
Modified: 2008-02-20 14:27 EST (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2008-02-20 14:27:17 EST
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Description Jonathan Underwood 2008-02-19 20:31:20 EST
Description of problem:
Recently on F-8 GDM stopped appearing in a vncts-ltsp-config xinetd started vnc
session. The session starts fine, but in the vnc window i just get the
black/white checkring that you normally get just before GDM starts. GDM doesn't
start and present me with a login screen.

Version-Release number of selected component (if applicable):

[same versions on both server and client - both fully updated F-8 nistalls.]

How reproducible:

Steps to Reproduce:
1.install vncts-ltsp-config on server, and start xinetd service
2.on local client do vncviewer -FullColour -via server.address.com localhost::5900
Actual results:
vnc session starts, but the GDM login never appears. 

Expected results:
vnc sessions starts, gdm appears

Additional info:
Not sure if this is a vnc or a gdm bug...
Comment 1 Jonathan Underwood 2008-02-19 20:32:58 EST
Corresponding lines in /var/log/messages:

Feb 20 01:21:12 withnail xinetd[13680]: xinetd Version 2.3.14 started with
libwrap loadavg labeled-networking options compiled in.
Feb 20 01:21:12 withnail xinetd[13680]: Started working: 3 available services
Feb 20 01:21:25 withnail xinetd[13680]: START: vnc pid=13686 from=::ffff:
Feb 20 01:22:48 withnail ntpd[2278]: synchronized to, stratum 2
Feb 20 01:23:31 withnail xinetd[13680]: EXIT: vnc status=0 pid=13686
Comment 2 Rex Dieter 2008-02-20 08:09:24 EST
The symptom(s) you're describing seem to indicate that you haven't enabled XDMCP
in your LOGINMANAGER (gdm).  By default, XDMCP is disabled, but is required for
vnc-ltsp-config to work.  Please confirm.
Comment 3 Jonathan Underwood 2008-02-20 12:07:30 EST
In gdmsetup I have enabled remote login .. so I think xdmcp is enabled.
Comment 4 Jonathan Underwood 2008-02-20 14:27:17 EST
xdmcp is indeed enabled (checked in /etc/gdm/custom.conf).

However, what I found just now was that doing init 3 && init 5 to restart GDM
fixed the problem. Not really sure what is going on, but I am confident this is
not a bug in vncts-ltsp-config, so closing. Sorry for the noise.

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