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I have a bunch of systems running different subreleases of CentOS 6, at different update levels. All of these machines have been configured to allow remote graphical sessions via GDM by adding the following settings to /etc/gdm/custom.conf:

[security]
DisallowTCP=false
AllowRemoteRoot=true

[xdmcp]
Enable=true

[greeter]
IncludeAll=true

And then changing the default runlevel to 5 in /etc/inittab:

id:5:initdefault:

Everything runs fine on all the systems but one. On one machine, running CentOS 6.7, despite being configured as the other ones (as far as I can tell), remote GDM sessions aren't available after reboot. Among this machine's processes I see

root      2295  2277  1 13:24 tty6     00:00:00 /usr/bin/Xorg :9 -ac -nolisten tcp vt6 -br

I found that from this stage I can make remote sessions available by issuing

kill -1 2295

After that the Xorg command line changes to:

/usr/bin/Xorg :0 -br -verbose -audit 4 -auth /var/run/gdm/auth-for-gdm-AwWtUF/database vt1

And everything works as expected.

Does anybody have an idea about why this is happening and how can I fix it? Thank you!

Nicola Musatti
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1 Answers1

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This problem was caused by the fact that the firstboot service was still enabled on these machines. After executing chkconfig firstboot off and rebooting the runlevel 5 startup took place correctly.

Nicola Musatti
  • 121
  • 4