Bug 1013620 - Failure when starting an XDMCP session
Failure when starting an XDMCP session
Product: Fedora
Classification: Fedora
Component: lightdm (Show other bugs)
Unspecified Unspecified
unspecified Severity high
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Assigned To: Rex Dieter
Fedora Extras Quality Assurance
Depends On:
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Reported: 2013-09-30 09:08 EDT by Patrick Monnerat
Modified: 2014-02-05 17:26 EST (History)
4 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2014-02-05 17:26:12 EST
Type: Bug
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Description Patrick Monnerat 2013-09-30 09:08:58 EDT
Description of problem:
After a number of perfect XDMCP session handling, lightdm fails to start any other. The time/number of good sessions before failure seems random.
In /var/log/message, the failure track is:
Sep 30 14:02:18 linuxdev xinetd[1040]: START: vnc-1152x864x24 pid=4569 from=
Sep 30 14:02:18 linuxdev lightdm[32540]: (lightdm:32540): GLib-GObject-WARNING **: invalid (NULL) pointer instance
Sep 30 14:02:18 linuxdev lightdm[32540]: (lightdm:32540): GLib-GObject-CRITICAL **: g_signal_handlers_disconnect_matched: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed
Sep 30 14:02:18 linuxdev lightdm[32540]: (lightdm:32540): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Sep 30 14:02:18 linuxdev xinetd[1040]: EXIT: vnc-1152x864x24 status=0 pid=4569 duration=0(sec)

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

How reproducible:
Seems random: no recipe.

Steps to Reproduce:
1. Enable XDMCP in lightdm.
2. Configure a dynamic vnc server via xinetd. I.e.:
   server          = /usr/bin/Xvnc
   server_args     = -inetd -once -query localhost -geometry 1152x864 -dpi 100 -depth 24 -securitytypes=none +extension GLX
3. Start and stop sessions until it fails.

Actual results:
When failure occurs, starting a vnc session flashes screen very quickly and quits.

Expected results:
No session failure.

Additional info:
The goal is to start a Mate session.

Thanks for investigating.
Comment 1 Fedora End Of Life 2013-12-21 09:38:09 EST
This message is a reminder that Fedora 18 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 18. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '18'.

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Comment 2 Fedora End Of Life 2014-02-05 17:26:12 EST
Fedora 18 changed to end-of-life (EOL) status on 2014-01-14. Fedora 18 is
no longer maintained, which means that it will not receive any further
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