Re: [gdm-list] XDMCP maximum session--- please help!

["Andrew Ziem" <andrewz springsrescuemission org>]

>>> I upgraded our LTSP 4.2 server (20+ concurrent users) from Fedora Core
>>> 6
>>> to Fedora 8 (GDM 2.20.1).  However, now I am having major XDMCP
>>> problems.    Stations cannot connect.   My /var/log/messages has:
>>>
>>> Nov 18 20:55:34 lucy gdm-binary[10273]: WARNING: Maximum number of open
>>> XDMCP sessions reached
>>> Nov 18 20:58:04 lucy gdm-binary[10273]:last message repeated 71 times
>>> Nov 18 20:59:39 lucy gdm-binary[10273]:last message repeated 10 times
>>> Nov 18 21:01:10 lucy gdm-binary[10273]:last message repeated 10 times
>>> Nov 18 21:01:29 lucy gdm-binary[10273]:last message repeated 12 times
>>>
>>> However, I made generous allowances in /etc/gdm/custom.conf
>>>
>>> [xdmcp]
>>> Enable=true
>>> MaxSessions=2000
>>> DisplaysPerHost=100
>>>
>>>
>>> I don't know how ~20 stations could max out the above limits.  Please
>>> help! :)
>>>
>>>
>> I found GDM is using the default value of 16.  So, how did I already get
>> 18, and how do I get >20?  Hmm.
>>
>> Nov 18 23:40:59 lucy gdm-binary[19852]: DEBUG: gdm_xdmcp_handle_request:
>> xdmcp_pending=0, MaxPending=4, xdmcp_sessions=18, MaxSessions=16,
>> ManufacturerID=
>> Nov 18 23:40:59 lucy gdm-binary[19852]: WARNING: Maximum number of open
>> XDMCP sessions reached
>
> If you have MaxSessions set to 2000, then this should be correct.  When
> you run this command, does it return the expected "2000" value in the
> configuration file:
>
>     gdmflexiserver --command="GET_CONFIG xdmcp/MaxSessions"

Thanks much for the reply, Brian!

Yes, it returns 2000.

> If not, you might need to restart GDM to get it to re-read the value.
> Try running gdm-restart as root.  I'm guessing that the GDM daemon
> wasn't updated to notice the new configuration setting, since it seems
> to think the default value of 16 is hitting the maximum value.

I have tried rebooting the whole system, gdm-restart, "init 3; init 5",
editing the GDM defaults file, and several other things.

Also, I filed a bug report:
http://bugzilla.gnome.org/show_bug.cgi?id=498277


Andrew