[X2Go-User] Aborting session with 'Unable to , open display , 'nx/nx'

[Qianqian Fang]

I changed the title of this thread. I believe this error message is the 
cause of the problem, but I don't know how to fix.

Right now, among the dozen Ubuntu 14.04 servers I run, half of them x2go 
works, and other half do not work.

all machines have applied the latest updates (x2go 4.1.0-1517 for the 
server components, 4.1.1.1-1719 for the client, and libnx-x11-6: 
2:3.5.99.16-0)

I compared the package versions, I can't see any difference between the 
servers that x2go works vs those failed - all x2go/nx components have 
identical versions.

when connecting to the machine have problems, the server side log gives 
"|Unable to open display 'nx/nx|", full log see below.

this issue only happens in March after some x2go package updates.

please help!

Qianqian


On 04/10/2018 01:19 AM, Qianqian Fang wrote:
>
> hi Mihai and other x2go users,
>
> I am wondering if you have any further comments or suggestions, I am 
> still unable to connect to more than half of my servers. All failed in 
> the same messages:
>
> *On the client side:*
>
> |Connection failed.||Failed to start X2Go Agent session with ID 
> fangq-...._stDXFCE_dp24. X2Go Agent terminated unexpectedly. Aborting 
> session startup. |
>
> *on the server side:*
>
> |Info: Agent running with pid '4112'.||||Session: Starting session at 
> 'Tue Apr 10 01:15:16 2018'.||||Error: Aborting session with 'Unable to 
> open display 
> 'nx/nx,options=/tmp/.x2go-fangq/C-fangq-...._stDXFCE_dp24/options:51''.||||Session: 
> Aborting session at 'Tue Apr 10 01:15:16 2018'.||||Session: Session 
> aborted at 'Tue Apr 10 01:15:16 2018'.|
>
> all updated with the latest version of Ubuntu 14.04
>
> Qianqian
>
> On 03/26/2018 10:46 PM, Qianqian Fang wrote:
>> On 03/26/2018 10:44 PM, Mihai Moldovan wrote:
>>> Looks good, all old packages are in rc state (i.e., uninstalled, but not purged).
>>> Sorry, that should have been ls -ldh /usr/lib/*86*/nx/X11/*
>>>
>>> I'm interested in the files in there.
>>
>> here you go
>> |
>> ||*fangq at zodiac:~$ ls -ldh /usr/lib/*86*/nx/X11/**||
>> ||lrwxrwxrwx 1 root root 20 Mar 17 08:41 
>> /usr/lib/x86_64-linux-gnu/nx/X11/libX11.so.6 -> ../../libNX_X11.so.6||
>> ||lrwxrwxrwx 1 root root 24 Mar 17 08:41 
>> /usr/lib/x86_64-linux-gnu/nx/X11/libX11.so.6.3.0 -> 
>> ../../libNX_X11.so.6.3.0|
>>
>>
>>>
>>> Like the other user on the mailing list wrote, purging sessions can be done
>>> using rm -vf /var/lib/x2go/x2go_sessions; x2godbadmin --createdb (both as root),
>>> but if there are no sessions currently that won't do anything useful.
>>
>> I see. are there other logs that I can find/provide to narrow down 
>> the issue?
>>
>> thank you again for your help.
>>
>> Qianqian
>>
>>>
>>> Mihai
>>>
>

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