[FreeNX-kNX] black screen after authentication

Wed Nov 14 14:36:06 UTC 2007

Hi, thanks for the hints. I am using

nx-3.0.0-4.el4.centos.x86_64
freenx-0.7.1.svn416-2.el4.centos.x86_64

from CentOS-4. I hope they have fixed the 64 bit issue.

In nxloadconfig I find the following paths I probably need to change

# Advanced users ONLY
AGENT_LIBRARY_PATH="" #Calculated
PROXY_LIBRARY_PATH="" #Calculated
APPLICATION_LIBRARY_PATH="" #Calculated
APPLICATION_LIBRARY_PRELOAD="" #Calculated

But where do they actually need to point to? What are the necessary 
libraries
for agent, proxy, etc. For example, under /usr/lib64/NX/lib I find

libX11.so.6    libXcompext.so.3      libXcompshad.so.3      
libXcomp.so.3      libXext.so.6    libXrender.so.1
libX11.so.6.2  libXcompext.so.3.0.0  libXcompshad.so.3.0.0  
libXcomp.so.3.0.0  libXext.so.6.4  libXrender.so.1.2.2

Is /usr/lib64/NX/lib then the path for the agent, the proxy, or the 
application?
Furthermore, I have different nxagent sitting around which are 
different, e.g.

/usr/bin/nxagent
/usr/lib/NX/nxagent
/usr/lib64/NX/nxagent

Which is the one I should use?

Michael

> On Wednesday 14 November 2007, Michael Oevermann wrote:
>   
>> Hello,
>>
>> I am having problems getting freenx running in CentOS 4.5  i386_64. I know
>> this is not a new problem, however, I havn't found a solution in all the
>> postings I found on the web. I did exactly what is supposed to work and
>> described in detail at
>> http://wiki.centos.org/HowTos/FreeNX
>> After doing a standard install I can connect to the server with nxclient
>> without problem but I get only a window with a black screen. In the files
>> .nx/S.../session  and errors
>> I see the warning
>> 	Warning: Unrecognized session type 'unix-gnome'. Assuming agent session.
>> The same happens with KDE. With the command
>> 	nxloadconfig --check
>> I get the output
>>
>> Warning: Could not find nxdesktop in /usr/bin. RDP sessions won't work.
>> Warning: Could not find nxviewer in /usr/bin. VNC sessions won't work.
>> Warning: Invalid value
>> "APPLICATION_LIBRARY_PRELOAD=/usr/lib/libX11.so.6.2:/usr/lib/libXext.so.6.4
>> :/usr/lib/libXcomp.so.2:/usr/lib/libXcompext.so:/usr/lib/libXrender.so.1.2".
>> /usr/lib/libX11.so.6.2 could not be found. Users will not be able to run a
>> single application in non-rootless mode.
>> Warning: Invalid value
>> "COMMAND_FOOMATIC=/usr/lib/cups/driver/foomatic-ppdfile" Users will not be
>> able to use foomatic.
>> Warning: "/usr/lib/cups/backend/nxipp" is not executable.
>>          Users will not be able to enable printing.
>> Warning: "/usr/lib/cups/backend/smb" is not executable.
>>          Users will not be able to enable printing.
>> Warning: Invalid value "COMMAND_START_CDE=cdwm"
>>          Users will not be able to request a CDE session.
>> Warning: Invalid cupsd version of "/usr/sbin/cupsd". Need version 1.2.
>>          Users will not be able to enable printing.
>> Error: Could not find 1.5.0 or 2.[01].0 or 3.0.0 version string in
>> nxagent. NX 1.5.0 or 2.[01].0 or 3.0.0 backend is needed for this
>> version of FreeNX.
>>   Errors occured during config check.
>>   Please correct the configuration file.
>>
>> The libraries are definitely not where nx looks for them - they are
>> located under /usr/lib64/NX/lib (and symlinks under (usr/lib/NX/lib).
>> What is going wrong here? I also tried to use nxconfig with
>> --setup-nomachine-key with the same error messages and warnings as in the
>> log files
>>
>> Does anyone has an idea to solve the problem? If its only a path problem to
>> the libs, where are the configuration files and which variables do I need
>> to set? Is a simple nxconfig with "corrected" settings enough to set up the
>> server correctly?
>>     
>
> You should be able to update the config in /etc/nxserver/node.conf with the 
> correct values. The defaults are in nxloadconfig wherever that is on your 
> system. The Fedora packages have the defaults modified to reflect the 
> Fedora-style locations. 
>
> You don't mention any versions, so you may also run into a 64bit issue. 64bit 
> support only appeared properly in nx 3.0.0. Later 2.1.0 binaries for Fedora 
> (and maybe others?) included a patch for 64 bit, but this wasn't reliable. It 
> would work fine on some systems and fail on others.
>
>   
>> Many thanks for help
>>
>> Michael
>>
>>
>>
>>
>>
>>
>> ________________________________________________________________
>>      Were you helped on this list with your FreeNX problem?
>>     Then please write up the solution in the FreeNX Wiki/FAQ:
>>   http://openfacts.berlios.de/index-en.phtml?title=FreeNX_FAQ
>>          Don't forget to check the NX Knowledge Base:
>>                  http://www.nomachine.com/kb/
>>
>> ________________________________________________________________
>>        FreeNX-kNX mailing list --- FreeNX-kNX at kde.org
>>       https://mail.kde.org/mailman/listinfo/freenx-knx
>> ________________________________________________________________
>>     
>
>
>
> ________________________________________________________________
>      Were you helped on this list with your FreeNX problem?
>     Then please write up the solution in the FreeNX Wiki/FAQ:
>   http://openfacts.berlios.de/index-en.phtml?title=FreeNX_FAQ
>          Don't forget to check the NX Knowledge Base:
>                  http://www.nomachine.com/kb/ 
>
> ________________________________________________________________
>        FreeNX-kNX mailing list --- FreeNX-kNX at kde.org
>       https://mail.kde.org/mailman/listinfo/freenx-knx
> ________________________________________________________________
>
>   

-- 
==========================================
Dr. Michael Oevermann
TU Berlin, Fak. III, Prozesswissenschaften
Institut für Energietechnik
Fasanenstr. 89, 10623 Berlin
Tel.: ++49 (0) 30 3142 2452
Fax : ++49 (0) 30 3142 2157
mailto: michael.oevermann at tu-berlin.de
==========================================