danny

[danny]

Hi @fra81

Thanks to your pointer on the Xorg issue. I did a apt full-upgrade, and so far I have not seen the problem.

My Xorg version is now:

X.Org X Server 1.19.5
Release Date: 2017-10-12

Before the upgrade, my Xorg version was:

X.Org X Server 1.19.3
Release Date: 2017-03-15

[danny]

I also encounter this problem, but in a slightly different way. When I activate “EnableScreenLock 1” in /usr/NX/etc/server.cfg, which should be equivalent to “Lock the physical screen when somebody connects”, I will see that my X server got restarted when I log in to nomachine. The different with the original post is that I saw the restart happening when I log in to nomachine session, not when I disconnect. This does not happen everytime, but on enough occassions to annoy users. When i disable “EnableScreenLock”, the problem goes away.

Please take a look at this problem because the “EnableScreenLock” is an important security feature for my setup.

I am using Ubuntu 16.04, NoMachine version 6.0.78 (I also observe the problem in 6.0.66).

Unfortunately i could not run the gdb on Xorg because of some missing packages.

This is what I see in /var/log/Xorg.log.old:

/var/log/Xorg.log.old:

[ 62405.430] (EE) Backtrace:
[ 62405.430] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4e) [0x56540b73fa9e]
[ 62405.430] (EE) 1: /usr/lib/xorg/Xorg (0x56540b58e000+0x1b57f9) [0x56540b7437f9]
[ 62405.430] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f71f4761000+0x11390) [0x7f71f4772390]
[ 62405.430] (EE) 3: /usr/lib/xorg/modules/drivers/modesetting_drv.so (0x7f71f0902000+0xc131) [0x7f71f090e131]
[ 62405.430] (EE) 4: /usr/lib/xorg/Xorg (0x56540b58e000+0xccf03) [0x56540b65af03]
[ 62405.430] (EE) 5: /usr/lib/xorg/Xorg (0x56540b58e000+0xd7df2) [0x56540b665df2]
[ 62405.430] (EE) 6: /usr/lib/xorg/Xorg (0x56540b58e000+0x19d0c3) [0x56540b72b0c3]
[ 62405.430] (EE) 7: /usr/lib/xorg/Xorg (miPointerSetPosition+0x19c) [0x56540b72becc]
[ 62405.430] (EE) 8: /usr/lib/xorg/Xorg (0x56540b58e000+0x6a91e) [0x56540b5f891e]
[ 62405.431] (EE) 9: /usr/lib/xorg/Xorg (0x56540b58e000+0x6b115) [0x56540b5f9115]
[ 62405.431] (EE) 10: /usr/lib/xorg/Xorg (GetPointerEvents+0x124) [0x56540b5fa9e4]
[ 62405.431] (EE) 11: /usr/lib/xorg/Xorg (0x56540b58e000+0xef423) [0x56540b67d423]
[ 62405.431] (EE) 12: /usr/lib/xorg/Xorg (0x56540b58e000+0x5428b) [0x56540b5e228b]
[ 62405.431] (EE) 13: /usr/lib/xorg/Xorg (0x56540b58e000+0x583b8) [0x56540b5e63b8]
[ 62405.431] (EE) 14: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f71f43b7830]
[ 62405.431] (EE) 15: /usr/lib/xorg/Xorg (_start+0x29) [0x56540b5d0329]
[ 62405.431] (EE)
[ 62405.431] (EE) Segmentation fault at address 0x0
[ 62405.431] (EE)
Fatal server error:
[ 62405.431] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 62405.431] (EE)
[ 62405.431] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 62405.431] (EE) Please also check the log file at “/var/log/Xorg.0.log” for additional information.
[ 62405.431] (EE)
[ 62405.431] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 62405.482] (EE) Server terminated with error (1). Closing log file.

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