Subject: Bug#1197: [X2Go-Dev] Bug#1197: Bug#1197: Bug#1197: Bug#1197: Bug#1197: Multihead fullscreen not working with TCE client in displaymanager mode

From: Walid MOGHRABI <[email-masked]>
Date: Tue, 25 Jul 2017 14:42:57 +0200 (CEST)

Mea culpa, finally found the logs you asked for, please find them attached.

Regards,
Walid Moghrabi

TRAVAUX.COM
BAT I - PARC CEZANNE 2 290 AVENUE GALILEE - CS 80403
13591 AIX EN PROVENCE CEDEX 3

----- Mail original ----- 

De: "Ulrich Sibiller" <[email-masked]> 
À: "Walid MOGHRABI" <[email-masked]>, [email-masked] 
Envoyé: Mardi 25 Juillet 2017 13:23:14 
Objet: Re: [X2Go-Dev] Bug#1197: Bug#1197: Bug#1197: Bug#1197: Bug#1197: Multihead fullscreen not working with TCE client in displaymanager mode 

Thanks. 

First, both sessions do not offer xinerama to their clients. 
Second: I mean the session log from nxagent, not from x2go. I cannot 
check here for the correct filename. It is somewhere in ~/.x2go on the 
server and starts similar to the following. Please also post the 
xrandr output from within the session. 
------------------------------------- 
NXAGENT - Version 3.5.0 
Copyright (C) 2001, 2011 NoMachine. 

See http://www.nomachine.com/ for 
more information. 
Info: Agent running with pid '2948'. 
Session: Starting session at 'Tue Jul 25 13:19:14 2017'. 

Info: Using alpha channel in render 
extension. 

Info: Not using local device configuration changes. 

... 
------------------------------------- 

I am a bit puzzled now. Is your x2goclient configuration really 
absolutely identical for both setups? Can you retry the (working) 
laptop session with a fresh user profile? 

Uli 

On Tue, Jul 25, 2017 at 11:42 AM, Walid MOGHRABI 
<[email-masked]> wrote: 
> Hi, 
> 
> Here a log files taken from the x2goserver when logged from my laptop (where it works) and from my tce (where it works badly). 
> I also attach the xdpyinfo output taken from within the x2go session from my laptop and from my tce ... As you will see, they are strictly identical. 
> 
> In the log files, apparently, RANDR and XINERAMA support is enabled in both cases. 
> 
> Regards, 
> Walid Moghrabi 
> 
> TRAVAUX.COM 
> BAT I - PARC CEZANNE 2 290 AVENUE GALILEE - CS 80403 
> 13591 AIX EN PROVENCE CEDEX 3 
> 
> ----- Mail original ----- 
> 
> De: "Walid MOGHRABI" <[email-masked]> 
> À: [email-masked], [email-masked] 
> Envoyé: Lundi 24 Juillet 2017 21:49:41 
> Objet: [X2Go-Dev] Bug#1197: Bug#1197: Bug#1197: Bug#1197: Multihead fullscreen not working with TCE client in displaymanager mode 
> 
> Well, I'll do this tomorrow. 
> The only thing I can tell is that multihead IS working on my laptop and I was quite sceptical too when I saw the output from my laptop ... I would have thought that it would list 2 separate screens at least and not on huge aggregated one. 
> 
> Are there any requirements for randr to work with X2Go and Arctica libs on the client side ? 
> Maybe there are some tools/libs missing on the TCE side. 
> I saw that x11-xserver-utils where missing on my TCE side which means xrandr tool was missing and I couldn't use it. 
> Anyway, installing it changed a thing (before, the second screen was black when the broker logon was there, now it is blue and the screen ordering is different) but it didn't changed anything once the X2Go session was opened (still MATE Desktop stretched on both screens and only 1 huge monitor seen by the screen utility). 
> 
> 
> Regards, 
> Walid Moghrabi 
> 
> TRAVAUX.COM 
> BAT I - PARC CEZANNE 2 290 AVENUE GALILEE - CS 80403 
> 13591 AIX EN PROVENCE CEDEX 3 
> 
> ----- Mail original ----- 
> 
> De: "Ulrich Sibiller" <[email-masked]> 
> À: "Stefan Baur" <[email-masked]>, [email-masked] 
> Envoyé: Lundi 24 Juillet 2017 20:35:20 
> Objet: [X2Go-Dev] Bug#1197: Bug#1197: Bug#1197: Multihead fullscreen not working with TCE client in displaymanager mode 
> 
> 
> If I understand correctly TCE is not the side where the nxagent is running. So the version oft nx-libs there does not matter. 
> 
> 
> I am wondering how the connection from the laptop can generate xinerama info as the laptop's xserver, that must provide the data, does not. Please post a log oft the nxagent startup. And the output oft xdpyinfo -ext XINERAMA within the session. 
> 
> 
> Uli 
> 
> 
> Am 24.07.2017 18:50 schrieb "Stefan Baur" < [email-masked] >: 
> 
> 
> 
> Am 24.07.2017 um 15:16 schrieb Walid MOGHRABI: 
> 
>> Using latest Arctica's NX-Libs xrandr support is far better and multihead support in fullscreen mode with the Linux x2goclient works like a charm. 
> [...] 
> 
>> So with the Linux client installed on a desktop (I'm personaly using Ubuntu 16.04 + Unity desktop) it works great whereas, in TCE / Displaymanager mode, multiple monitors are supported but the desktop is stretched as if it was only one big screen and not 2 separated screens. 
> 
> Are you sure your custom TCE build includes the Arctica NX-Libs? 
> I would suggest logging in to a running TCE and comparing the output of 
> "dpkg -l". 
> 
> Kind Regards, 
> Stefan Baur 
> 
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