[X2Go-Dev] Different behavior of X2Go Client from Desktop and TCE

[Ulrich Sibiller]

The magic pixel can be disabled in nxagent 3.5.99.16.

I am wondering why the the WM is relevant. Nxagent is talking to the X
server and not the WM. So what does xrandr report on the tce side with and
without WM?

Uli

Stefan Baur <X2Go-ML-1 at baur-itcs.de> schrieb am Mi., 16. Mai 2018, 15:25:

> Am 16.05.2018 um 15:11 schrieb Walid MOGHRABI:
> > This is a known bug I encountered and this is due to the lack of Window
> Manager.
> > Apparently, the WM is needed to have a good working xinerama.
> >
> > I fixed this by installing OpenBox in my TCE image and added this line :
> >
> >
> >
> ============================================================================================
> > --- /usr/sbin/x2gothinclientd
> > +++ /usr/sbin/x2gothinclientd
> > @@ -175,6 +175,9 @@
> >                       }
> >               }
> >
> > +             # Spawn openbox
> > +             system("su - x2gothinclient -c \"DISPLAY=:0 openbox &\"");
> > +
> >               # set screen background to X2Go default blue on all
> detected screens
> >               `DISPLAY=:0 xsetroot -solid "#246ed8"`;
> >
> ============================================================================================
> >
> > I also did a few modifications to /etc/xdg/openbox/rc.xml to disable
> windows borders and a few stuff ... in fact these are just modifications
> you can find in the TCE Live Build project.
> > Please find my rc.xml attached.
> >
> > Once you do this, everything works just like on your desktop.
>
> ... or not.
>
> As I said, it also happens in TCE-Live, though only sometimes.
> Hooooweveeeerr ... we include code to kill openbox once the NX window
> comes up, so that the dreaded magic pixel won't trigger.
>
> Maybe the act of disabling sometimes happens too soon, and we get a race
> condition between the xinerama components and the magic-pixel-workaround.
>
> Kind Regards,
> Stefan Baur
>
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