[X2Go-Dev] Bug#873: suggestion for how to handle Xinerama from NX 3.6.x in X2Go

[Mike Gabriel]

Hi Mihai, hi Alex,

the new RandR based Xinerama is about to be merged to the nx-libs
3.6.x branch. Here are some ideas how to make the feature addressable
in X2Go.

1.
X2Go Client can server-side query x2gofeaturelist, it outputs the
string X2GOAGENT_RANDRXINERAMA. If that string is in x2gofeaturelist,
then the new Xinerama code is present in x2goagent/nxagent.

2.
We are about to add a xinerama={0,1} NX option for the NX options file
(Ulrich is probably reviewing right now...). This should be used
through NX proxy (I guess) for setting up Xinerama in X2Go Agent. It
works on session startup and session resumption.

3.
One can disable Xinerama completely via cmdline switch for x2goagent:
-disablexineramaextension.


My suggestion is:

o you keep the xinerama.conf file with X2GOAGENT_RANDRXINERAMA,
but put "enabled" or "disabled" into it
o the "enabled" switch is rather for human beings, because the real
enabling takes place via NX options
o if "disabled" is set, then x2gostartagent should notice that
and add -disablexineramaextension

Also, -disablexineramaextension should be added (commented out, of
course, thus for reference) to /etc/x2go/x2goagent.options.

So far from Uli's and Mike's Xinerama hacking frontier...

Greets,
Mike
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[Mihai Moldovan]

In order to disable XINERAMA, we can either:

- pass xinerama=0 as an nx/nx option
- pass -xinerama AND -rrxinerama to x2goagent/nxagent as a normal option

Merely passing -rrxinerama will only disable the Randr-XINERAMA part, but the
PanoramiX-XINERAMA implementation will stay enabled.

Also see
https://github.com/ArcticaProject/nx-libs/blob/3.6.x/nx-X11/programs/Xserver/hw/nxagent/man/nxagent.1
for more information.

Older nxagent versions do not support the xinerama nx/nx option or the
-rrxinerama switch.


Mihai

[Mike Gabriel]

Control: close -1

Post by Mihai Moldovan
- pass xinerama=0 as an nx/nx option
- pass -xinerama AND -rrxinerama to x2goagent/nxagent as a normal option
Merely passing -rrxinerama will only disable the Randr-XINERAMA part, but the
PanoramiX-XINERAMA implementation will stay enabled.
Also see
https://github.com/ArcticaProject/nx-libs/blob/3.6.x/nx-X11/programs/Xserver/hw/nxagent/man/nxagent.1
for more information.
Older nxagent versions do not support the xinerama nx/nx option or the
-rrxinerama switch.
Mihai

Fixed in X2Go Server since commit 7e0dce4aaf71b03db72c3dd21ff158ce3460532d.

Thus, closing...

Mike

[X2Go Bug Tracking System]

Post by Mike Gabriel
close -1

Bug #873 [x2goserver] Drop Xinerama / LD_LIBRARY_PATH related code from x2goruncommand for nxagent >= 3.5.99.0
Marked Bug as done