[X2Go-Dev] improve Xinerama

Hello,

I have been playing around with x2go and xinerama. While the current setup kind of works there are some problems with the current concept: programs doing that...)

• it uses LD_LIBRARY_PATH. Any software that fiddles around with LD_LIBRARY_PATH can break it (and there a lot (mostly commercial)

• it does not fully work on mixed architecture setups (32/64bit mix) because there's only one library in the distribution. (I haven't tested this but it AFAIK you cannot link a 32bit library to a 64 binary an vice versa.)
• requesting xinerama information (xdpyinfo -ext XINERAMA) does only work for programs that are started inside the session. You cannot request Xinerama information by redirecting $DISPLAY for the calling program. You'd as well have to set the LD_LIBRARY_PATH variable.
• connection to an other host using ssh -X other-host leads to a working shell that has a DISPLAY. However, it is not able to request the correct Xinerama information.
• probably more

The reason for all this is the chosen approach. Patching the libXinerama.so only works for clients actually able to access the patched library. If - for whatever reason - they are using the standard libXinerama this fails. So I really think the patched library should vanish completely. Instead nx-X11/programs/xserver/Xext/panoramix.c should be extended to do a lookup to the nx client side whenever an X client is asking the nxagent/x2goagent for Xinerama information.

What do you think? Is there anything I am missing here?

Uli