No available sessions (local display disabled) on Fedora 21

[wernermaes]

Although my X server is running

root      1412  0.5  6.1 179988 127048 tty1    Ss+  10:37   0:05 /usr/libexec/Xorg.bin :0 -background none -noreset -verbose 3 -logfile /dev/null -auth /run/gdm/auth-for-gdm-rdSSrj/database -seat seat0 -nolisten tcp vt1

and it’s possible to login (NoMachine server free version 4.4.1, client 4.4.1 on fedora 21) I cannot open a physical desktop (no available sessions on this server).

On Fedora 20 with version 4.3.30 this works fine.

Any ideas?

[wernermaes]

Here are some relevant pieces of the debug log

2014-12-18 14:06:41 934.870  4004 NXSERVER checkLocalSession: Found socket for display [0] – [unix  2      [ ACC ]     STREAM     LISTENING     17659    @/tmp/.X11-unix/X0]
2014-12-18 14:06:41 935.030  4004 NXSERVER Going to find X server for display: [0]
2014-12-18 14:06:41 935.612  4004 NXSERVER Found X server process: [Xorg.bin        /usr/libexec/Xorg.bin :0 -background none -noreset -verbose 3 -logfile /dev/null -auth /run/gdm/auth-for-gdm-WT4O6X/database -seat seat0 -nolisten tcp vt1]
2014-12-18 14:06:41 935.823  4004 NXSERVER checkLocalSession: Found authority /run/gdm/auth-for-gdm-WT4O6X/database.
2014-12-18 14:06:41 935.988  4004 NXSERVER checkLocalSession: Found seat seat0.
2014-12-18 14:06:41 936.290  4004 NXSERVER Found node assigned to display 0.
2014-12-18 14:06:41 936.609  4004 NXSERVER Session for display 0 not changed. Skip recognition.
2014-12-18 14:06:41 936.819  4004 NXSERVER recognizeXSession: kind [session] based on command [mate-session    mate-session] pid [1507]
2014-12-18 14:06:41 937.283  4004 NXSERVER checkLocalSession: Found socket for display [1001] – [unix  2      [ ACC ]     STREAM     LISTENING     41507    /tmp/.X11-unix/X1001]
2014-12-18 14:06:41 937.446  4004 NXSERVER Going to find X server for display: [1001]
2014-12-18 14:06:41 938.330  4004 NXSERVER checkLocalSession: Found socket for display [1001] – [unix  2      [ ACC ]     STREAM     LISTENING     41506    @/tmp/.X11-unix/X1001]
2014-12-18 14:06:41 938.487  4004 NXSERVER Going to find X server for display: [1001]
2014-12-18 14:06:41 939.473  4004 NXSERVER Found node assigned to session pid 1507.
2014-12-18 14:06:41 939.757  4004 NXSERVER NXPL was already loaded.
2014-12-18 14:06:41 939.919  4004 NXSERVER NXPL::NXGetRandomString start.
2014-12-18 14:06:41 940.071  4004 NXSERVER NXPL::NXGetRandomString stop.
2014-12-18 14:06:41 940.291  4004 NXSERVER isLoginWindowByNXPL random string: 61F8ABE74EE2E298C32BF4DBB733AD24
2014-12-18 14:06:41 940.489  4004 NXSERVER isLoginWindowByNXPL tempfile: /var/NX/nx/.nx/61F8ABE74EE2E298C32BF4DBB733AD24.lcookie_2
2014-12-18 14:06:41 940.971  4004 NXSERVER isLoginWindowByNXPL addCookie(/var/NX/nx/.nx/61F8ABE74EE2E298C32BF4DBB733AD24.lcookie_2, :0, MIT-MAGIC-COOKIE-1, ********) return 0
2014-12-18 14:06:41 941.206  4004 NXSERVER isLoginWindowByNXPL set XAUTHORITY to /var/NX/nx/.nx/61F8ABE74EE2E298C32BF4DBB733AD24.lcookie_2
2014-12-18 14:06:41 941.379  4004 NXSERVER isWMRunningByDisplay call on :0
2014-12-18 14:06:41 942.891  4004 NXSERVER NXPL::NXWmRunning(:0) [1]
2014-12-18 14:06:41 943.067  4004 NXSERVER isLoginWindowByNXPL isWMRunningByDisplay return [1]
2014-12-18 14:06:41 943.301  4004 NXSERVER isLoginWindowByNXPL clean out file: /var/NX/nx/.nx/61F8ABE74EE2E298C32BF4DBB733AD24.lcookie_2
2014-12-18 14:06:41 943.572  4004 NXSERVER isLoginWindowByNXPL(0, ********) return [1]
2014-12-18 14:06:41 943.797  4004 NXSERVER PhysicSessions::isLoginWindowByCK missed all checkpoints

[Britgirl]

This seems to be an issue with SELinux. We are working on changes to our SELinux modules in order to make it work on FC21. Does disabling SELinux help?

https://docs.fedoraproject.org/en-US/Fedora/11/html/Security-Enhanced_Linux/sect-Security-Enhanced_Linux-Enabling_and_Disabling_SELinux-Disabling_SELinux.html

[wernermaes]

Hello

I had already disabled SElinux. So it seems not to be related to Selinux

[root@fedora21 nx]# getenforce

Disabled

 

 

[Britgirl]

Please try to run the following command from a console on the server:

NX_ROOT=/usr/NX NX_SYSTEM=${NX_ROOT} LD_LIBRARY_PATH=${NX_ROOT}/lib:${NX_ROOT}/lib:$LD_LIBRARY_PATH bash -c ‘${NX_ROOT}/bin/nxkeygen -u’

and show us the output.

If command above doesn’t return an error, please try to fix the problem as follows.

1) Remove uuid file:

sudo rm /usr/NX/etc/uuid

2) Update the NoMachine server installation:

sudo /usr/NX/scritps/nxserver –update

Then, please send us the following file:

/usr/NX/var/log/nxupdate.log

[wernermaes]

[root@fedora21 ~]# NX_ROOT=/usr/NX

[root@fedora21 ~]#  NX_SYSTEM=${NX_ROOT}
[root@fedora21 ~]# LD_LIBRARY_PATH=${NX_ROOT}/lib:${NX_ROOT}/lib:$LD_LIBRARY_PATH
[root@fedora21 ~]# bash -c ${NX_ROOT}/bin/nxkeygen -u
/usr/NX/bin/nxkeygen: error while loading shared libraries: libnx.so: cannot open shared object file: No such file or directory
[root@fedora21 ~]# locate libnx.so
/usr/NX/lib/libnx.so

after exporting LD_LIBRARY_PATH (export LD_LIBRARY_PATH)

[root@fedora21 ~]# bash -c nxkeygen -u
14234 14234 11:08:13 665.753 Main: ERROR! Usage: nxkeygen [-k privatekey [-c certificate] [-p publickey] [-t type]] [-r] [-n length] [-u].

[root@fedora21 init]# /usr/NX/scripts/setup/nxserver –update
NX> 701 Starting update at: Tue Jan 06 11:15:31 2015.
NX> 701 Updating: nxclient version: 4.4.1.
NX> 701 Using installation profile: Fedora.
NX> 701 Update log is: /usr/NX/var/log/nxupdate.log.
NX> 701 Client update completed with warnings.
NX> 701 Please review the update log for details.
NX> 701 Updating: nxplayer version: 4.4.1.
NX> 701 Using installation profile: Fedora.
NX> 701 Update log is: /usr/NX/var/log/nxupdate.log.
NX> 701 Updating: nxnode version: 4.4.1.
NX> 701 Using installation profile: Fedora.
NX> 701 Update log is: /usr/NX/var/log/nxupdate.log.
NX> 701 Saving configuration file to: /usr/NX/etc/node.cfg.backup.
NX> 701 Creating configuration in: /usr/NX/etc/node.cfg.

Support for these types of sessions is available:
physical-desktop,shadow,unix-xsession-default,unix-gnome,unix-xdm,vnc
You can enable this by running:
/usr/NX/scripts/setup/nxnode –availablesessionsetup

NX> 701 Node update completed with warnings.
NX> 701 Please review the update log for details.
NX> 701 Updating: nxserver version: 4.4.1.
NX> 701 Using installation profile: Fedora.
NX> 701 Update log is: /usr/NX/var/log/nxupdate.log.
NX> 701 Saving configuration file to: /usr/NX/etc/server.cfg.backup.
NX> 701 Creating configuration in: /usr/NX/etc/server.cfg.ls

 

 

[Britgirl]

Did you send on the nxupdate.log to issues[at]…?

[wernermaes]

I’ve sent it now.

Kind regards

Werner

[zaq]

Hello,
Could you try to update to 4.4.6, please? There is a fix for SELinux
Fedora 21.
If the issue persists please gather debug information following the
instructions here:

https://www.nomachine.com/AR07K00677

Also please save active processes:

ps -Af | grep nx > processes.txt

Send debug information and ‘processes.txt’ to issues[at]nomachine[dot]com.

[wernermaes]

Hello

Updating to version 4.4.6 solves this issues.

Thank you for your support !

Werner

[Author]

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