[X2Go-User] X2Go server, nxagent causes segfault

[Norman Gaywood]

I'm thinking it may be the latest update to libNX_X11 (a few days ago)

But the x2go repo does not contain old versions, so I can't test the
downgrade.

Anyone know how to downgrade?
rpm -q libNX_X11-6
libNX_X11-6-3.5.99.15-0.0build1.1.git20180308.2971.main.fc27.x86_64

dnf downgrade libNX_X11-6
Last metadata expiration check: 0:00:00 ago on Tue 13 Mar 2018 15:01:38
AEDT.
Package libNX_X11-6 of lowest version already installed, cannot downgrade
it.
Error: No packages marked for downgrade.




On Tue, 13 Mar 2018 at 14:44, Norman Gaywood <ngaywood at une.edu.au> wrote:

> I'm getting this on Fedora 27 (XFCE) as well.
>
> x2goserver-4.1.0.0-0.0x2go1.1.git20180302.1517.main.fc27.x86_64
>
> I notice that if you don't resize or move the x2go client window it stays
> stable (does not segfault).
>
>
> On Mon, 12 Mar 2018 at 22:35, Kalle Tuulos <kalle at tuulos.net> wrote:
>
>> Hello
>>
>> I'm using X2Go server in several computers, all running Ubuntu. Just
>> today, one of my computers (headless Linux box) just froze and I had to
>> give it a power cycle reset. After powering up again, I can't any more
>> connect to X2Go.
>>
>> I'm getting following into /var/log/syslog:
>> ---8<---8<---
>> Mar 12 13:15:40 kallebuntu systemd[1]: Started Session 10 of user ktuulos.
>> Mar 12 13:15:49 kallebuntu /usr/sbin/x2gocleansessions[1091]:
>> ktuulos-50-1520853345_stDLXDE_dp32: state file for this session does not
>> exist: /tmp/.x2go-ktuulos/C-ktuulos-50-1520853345_stDLXDE_dp32/state (this
>> can be ignored during session startups)
>> Mar 12 13:15:51 kallebuntu /usr/bin/x2gostartagent: successfully started
>> X2Go Agent session with ID ktuulos-50-1520853345_stDLXDE_dp32
>> Mar 12 13:15:58 kallebuntu kernel: [ 1315.845394] nxagent[9647]: segfault
>> at 8 ip 000056286f70db3a sp 00007ffea2bd1bc0 error 4 in
>> nxagent[56286f693000+432000]
>> Mar 12 13:16:04 kallebuntu /usr/bin/x2gosetkeyboard: Setting X keyboard
>> according to
>> /home/ktuulos/.x2go/C-ktuulos-50-1520853345_stDLXDE_dp32/keyboard
>> Mar 12 13:16:05 kallebuntu /usr/bin/x2goruncommand: launching session
>> with Xsession-x2go mechanism, using STARTUP="startlxde"
>> Mar 12 13:16:05 kallebuntu /usr/bin/x2goruncommand: dbus wrapper
>> available as /usr/bin/dbus-run-session
>> ---8<---8<---
>>
>> This computer is running Ubuntu 16.04. X2go server has been installed
>> using the ppa method.
>> ---8<---8<---
>> ktuulos at kallebuntu:~$ uname -a
>> Linux kallebuntu 4.13.0-36-generic #40~16.04.1-Ubuntu SMP Fri Feb 16
>> 23:25:58 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
>> ktuulos at kallebuntu:~$ dpkg -s x2goserver | grep Version
>> Version: 4.1.0.0-0~1517~ubuntu16.04.1
>> ktuulos at kallebuntu:~$ cat
>> /etc/apt/sources.list.d/x2go-ubuntu-stable-xenial.list
>> deb http://ppa.launchpad.net/x2go/stable/ubuntu xenial main
>> # deb-src http://ppa.launchpad.net/x2go/stable/ubuntu xenial main
>> ---8<---8<---
>>
>> There seem to be no hardware problems - I installed mcelog and I'm now
>> monitoring its output. Nothing.
>>
>> Could anyone give some hints? I have spent the last hour googling about
>> "nxagent segfault", but I haven't found anything, which would help.
>>
>> Thanks,
>>   Kalle
>>
>> _______________________________________________
>> x2go-user mailing list
>> x2go-user at lists.x2go.org
>> https://lists.x2go.org/listinfo/x2go-user
>
>
>
> --
> Norman Gaywood, Computer Systems Officer
> School of Science and Technology
> University of New England
> Armidale NSW 2351, Australia
>
> ngaywood at une.edu.au  http://turing.une.edu.au/~ngaywood
> Phone: +61 (0)2 6773 2412  Mobile: +61 (0)4 7862 0062
>
> Please avoid sending me Word or Power Point attachments.
> See http://www.gnu.org/philosophy/no-word-attachments.html
>


-- 
Norman Gaywood, Computer Systems Officer
School of Science and Technology
University of New England
Armidale NSW 2351, Australia

ngaywood at une.edu.au  http://turing.une.edu.au/~ngaywood
Phone: +61 (0)2 6773 2412  Mobile: +61 (0)4 7862 0062

Please avoid sending me Word or Power Point attachments.
See http://www.gnu.org/philosophy/no-word-attachments.html
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